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  1. Effect of exchangeable sodium and phosphogypsum on the hydraulic properties of several South African soils

    Effect of exchangeable sodium and phosphogypsum on the hydraulic properties of several South African soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.M. du Plessis --- , I. Shainberg --- ,
    The susceptibility of soils to the deleterious effects of sodicity was assessed for samples which varied with respect to physical, mineralogical and other properties. For this purpose soil samples were collected from different locations in South Africa. The effect of...
  2. Die swawelstatus van besproeiingsgronde onder veranderende bemestingspraktyke

    Die swawelstatus van besproeiingsgronde onder veranderende bemestingspraktyke

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. van Schalkwyk --- Departement van Landbou en Watèrvoorsiening, Republiek van Suid-Afrika R. du T. Burger --- , Republiek van Suid-Afrika
    Die effek van die gebruik van swawelvrye teenoor swawelbevattende bemestingstowwe op die swawelstatus van 'n Mangano-grond van Vaalharts, is met behulp van 'n potproef ondersoek. Waar swawelvrye bemestingstowwe gebruik is was gebreksimptome na die derde snysel reeds duidelik sigbaar by...
  3. A turbidimeter for measuring soil-particle concentration in suspensions

    A turbidimeter for measuring soil-particle concentration in suspensions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Nel --- Department of Soil Science, Republic of South Africa E.P. Blignaut --- Department of Electronic Services, Republic of South Africa
    A turbidimeter was designed and constructed to determine the degree of dispersion associated with different treatments of soil samples in suspension. Measurement is based on the transmission of light through a dispersed soil suspension. The experimental array of light source,...
  4. Protein turnover: possible contributing factor in determining drought tolerance in <em>Nicotiana tabacum</em> L.

    Protein turnover: possible contributing factor in determining drought tolerance in Nicotiana tabacum L.

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. van Rensburg --- Department of Plant and Soil Sciences, Republic of South Africa G. H.J. Krüger --- Department of Plant and Soil Sciences, Republic of South Africa
    Drought stress-induced changes in the water-soluble protein concentration and total number of sulphydryl (-SH) groups were monitored under controlled environmental conditions in four tobacco cultivars (Nicotiana tabacum L.) with different drought tolerances. The drought stress ranged from light (-0.52 MPa)...
  5. The influence of varying P concentrations on the yield and abnormalities of lettuce leaves

    The influence of varying P concentrations on the yield and abnormalities of lettuce leaves

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.S. Claassens --- Department of Soil Science and Plant Nutrition, Republic of South Africa
    The effect of varying P concentrations on the growth, yield and development of leaf abnormalities, nutrient content and uptake of other nutrient elements was investigated for lettuce.Three cultivars (Chaparal, Wintercrisp and Robinvale) were studied in sand cultures and soil. The...
  6. Reaksie van twee lentekoringkultivars op stikstof- en swaelbemesting in die Swartland. I. Vegetatiewe groei, opname en konsentrasie van stikstof en swael in die vegetatiewe plant

    Reaksie van twee lentekoringkultivars op stikstof- en swaelbemesting in die Swartland. I. Vegetatiewe groei, opname en konsentrasie van stikstof en swael in die vegetatiewe plant

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P. du Plessis --- , Republiek van Suid-Afrika G.A. Agenbag --- Departement Akkerbou en Weidlng, Republiek van Suid-Afrika
    Die belangrikheid van die korrekte N: S verhouding het die vraag laat ontstaan of 'n wanbelans tussen N en S nie gedeeltelik 'n bydrae tot die swak benuttingsdoeltreffendheid van N by hoë N-bemestings in die Swartland kan lewer nie. 'n...
  7. Elucidation of seasonal pigmentation patterns in the involucral leaves of <em>Leucadendron</em> ‘Safari Sunset’

    Elucidation of seasonal pigmentation patterns in the involucral leaves of Leucadendron ‘Safari Sunset’

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael Schmeisser --- Department of Horticultural Science, South Africa Gerard J Jacobs --- Department of Horticultural Science, South Africa Willem J Steyn --- Department of Horticultural Science, South Africa
    This study investigates seasonal pigmentation patterns found in the involucral leaves of Leucadendron ‘Safari Sunset’, with the long-term aim of colour manipulation. Treatments comprised deconed shoots and shoots in which the opening of the flower head was physically prevented. During...
  8. CHEMICAL CHANGES IN THE GROWTH MEDIUM OF <em>MICROCYSTIS</em>, BATCH CULTURES GROWN AT STRESS AND NON-STRESS LIGHT INTENSITIES

    CHEMICAL CHANGES IN THE GROWTH MEDIUM OF MICROCYSTIS, BATCH CULTURES GROWN AT STRESS AND NON-STRESS LIGHT INTENSITIES

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: G H J Krüger --- Botany Department, South Africa JN Eloff --- Botany Department, South Africa
    The modified BG 11 growth medium used in this study has a poor buffer ability and large pH changes occurred during growth of Microcystis. Inhibition of growth in cultures grown at stress light intensity (26 μEinst m−2 sec−1) could be...
  9. EFFECT OF PHOSPHATE CONCENTRATION ON THE FINE STRUCTURE OF THE CYANOBACTERIUM, <em>MICROCYSTIS AERUGINOSA</em> KÜTZ. EMEND. ELENKIN

    EFFECT OF PHOSPHATE CONCENTRATION ON THE FINE STRUCTURE OF THE CYANOBACTERIUM, MICROCYSTIS AERUGINOSA KÜTZ. EMEND. ELENKIN

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: DerylJ. Barlow --- , South Africa W. L.J. van Rensburl --- , South Africa A. J.H. Pieterse --- , South Africa J.N. Eloff --- , South Africa
    Microcystis aeruginosa toxic strain UV-006 stored a fixed amount of polyphosphate in spherical granules located in the centroplasm. Twenty four hours of phosphate starvation induced use of stored polyphosphate, manifested by reduction in granule numbers. Reintroduction of 2, 4 or...
  10. DISSOLVED OXYGEN DEPLETION AND NUTRIENT UPTAKE IN AN IMPOUNDMENT INFESTED WITH <em>EICHHORNIA CRASSIPES</em> (MART.) SOLMS

    DISSOLVED OXYGEN DEPLETION AND NUTRIENT UPTAKE IN AN IMPOUNDMENT INFESTED WITH EICHHORNIA CRASSIPES (MART.) SOLMS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: S.N. Shillinglaw --- Department of Water Affairs, South Africa
    Bon Accord Dam, near Pretoria, had 95% of its surface area covered by water hyacinth (Eichhornia crassipes (Mart) Solms). The mean surface dissolved oxygen concentration was 1,9 mg O2 2−1 which is below the minimum concentration required by most angling...
  11. AN ASSESSMENT OF A RAPID AND CONVENIENT SPECTROPHOTOMETRY ADAPTATION OF THE WINKLER PROCEDURE FOR THE DETERMINATION OF DISSOLVED OXYGEN IN FRESH WATERS

    AN ASSESSMENT OF A RAPID AND CONVENIENT SPECTROPHOTOMETRY ADAPTATION OF THE WINKLER PROCEDURE FOR THE DETERMINATION OF DISSOLVED OXYGEN IN FRESH WATERS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P.J. Ashton --- National Institute for Water Research, South Africa A.J. Twinch --- National Institute for Water Research, South Africa
    The use of a spectrophotometric adaptation of the standard Winkler procedure to measure the dissolved oxygen content of water samples is described and assessed. The technique allows the rapid processing of routine samples and the accuracy, precision and sensitivity of...
  12. A note on copper bioaccumulation in Mozambique tilapia, <em>Oreochromis mossambicus</em> (Osteichthyes: Cichlidae)

    A note on copper bioaccumulation in Mozambique tilapia, Oreochromis mossambicus (Osteichthyes: Cichlidae)

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Irene Naigaga Horst Kaiser
    Copper (Cu) is one of the most commonly reported metal pollutants in African water bodies, but there are few studies on African freshwater fish species of copper accumulation and copper toxicity. Adult O. mossambicus were exposed to 0mg l−1 (control)...
  13. Gastropod distribution in Lakes George and Edward, Uganda, relative to copper and cobalt levels

    Gastropod distribution in Lakes George and Edward, Uganda, relative to copper and cobalt levels

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RD Holmberg --- Chemicals Division, Danish Environmental Protection Agency, Denmark H Madsen --- DBL Centre for Health Research and Development, Department of Veterinary Disease Biology, Faculty of Life Sciences, Denmark TK Kristensen --- DBL Centre for Health Research and Development, Department of Veterinary Disease Biology, Faculty of Life Sciences, Denmark A Jørgensen --- DBL Centre for Health Research and Development, Department of Veterinary Disease Biology, Faculty of Life Sciences, Denmark
    Published data show that Lake George, Uganda, has a poorer gastropod fauna than Lake Edward, to which it is connected through the Kazinga Channel. We conducted a study in 2001 to test whether this could be linked to copper (Cu)...
  14. Metal concentrations in water, sediment and sharptooth catfish <em>Clarias gariepinus</em> from three peri-urban rivers in the upper Manyame catchment, Zimbabwe

    Metal concentrations in water, sediment and sharptooth catfish Clarias gariepinus from three peri-urban rivers in the upper Manyame catchment, Zimbabwe

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Nhiwatiwa --- Department of Biological Sciences, Zimbabwe M Barson --- Department of Biological Sciences, Zimbabwe AP Harrison --- Department of Animal and Veterinary Basic Sciences, Denmark B Utete --- Department of Biological Sciences, Zimbabwe RG Cooper --- Division of Physiology, UK
    Concentrations of zinc, cadmium, chromium, nickel, lead, copper and iron were measured in flowing water, riverbed sediments and tissues of sharptooth catfish Clarias gariepinus from three rivers in the upper Manyame catchment over seven months in 2008–2009. The Manyame and...
  15. Heavy metal concentrations in the water of the Nyl River system, South Africa

    Heavy metal concentrations in the water of the Nyl River system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Greenfield --- Department of Zoology, South Africa JHJ van Vuren --- Department of Zoology, South Africa V Wepener --- Department of Zoology, South Africa
    The Nyl River floodplain, a Ramsar site that provides habitat for a number of endangered species, is one of the jewels in the arid Limpopo province and thus its conservation and protection are vitally important. Very little work has been...
  16. Determining the minimum effective dose of rotenone for eradication of alien smallmouth bass <em>Micropterus dolomieu</em> from a South African river

    Determining the minimum effective dose of rotenone for eradication of alien smallmouth bass Micropterus dolomieu from a South African river

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MS Jordaan --- CapeNature Scientific Services, South Africa OLF Weyl --- South African Institute for Aquatic Biodiversity, South Africa
    In February 2012 the Rondegat River, in the Cape Floristic Region, was the first river in South Africa where the piscicide rotenone was used to remove an alien invasive fish, smallmouth bass Micropterus dolomieu. In preparation for this treatment, the...
  17. Foliar nutrient levels as indicators of site quality for <em>Pinus patula</em> in the Mpumalanga escarpment area

    Foliar nutrient levels as indicators of site quality for Pinus patula in the Mpumalanga escarpment area

    Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: J.R. Louw --- , M.C. Scholes --- School of Plant, Animal & Environmental Sciences, South Africa
    The South African forest industry is based on intensively managed monoculture systems, and requires diagnostic tools for the development of site-related nutrient management policies. Worldwide, the evaluation of foliar nutrient concentrations is one of the most widely used techniques in...
  18. Effects of temperature on <em>Pinus patula</em> seedlings growing in pots in a controlled environment

    Effects of temperature on Pinus patula seedlings growing in pots in a controlled environment

    Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Colleen A. Carlson --- Horticultural Science Department, South Africa Ross Allan --- Shaw Research Centre, South Africa Andrew R. Morris --- Shaw Research Centre, South Africa
    The re-establishment of Pinus patula seedlings into sites with high harvesting residue (slash) loads can negatively affect the survival of these plants. Field trials have examined the role that insect pests and fungal diseases play in causing this phenomenon. Research...
  19. Comparative ecology of the copepods <em>Calanoides carinatus</em> and <em>Calanus agulhensis</em> — the influence of temperature and food

    Comparative ecology of the copepods Calanoides carinatus and Calanus agulhensis — the influence of temperature and food

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JA Huggett AJ Richardson JG Field
    Hypotheses regarding temperature, food abundance and food size were tested to explore niche separation between Calanoides carinatus, an abundant copepod in the cool and food-rich southern Benguela upwelling system, and Calanus agulhensis, the dominant copepod on the warmer, relatively food-poor...
  20. Variations in the dominant algal bloom-forming species in the western South China Sea from 1993 to 2007

    Variations in the dominant algal bloom-forming species in the western South China Sea from 1993 to 2007

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CL Liu --- Key Laboratory of Tropical Marine Environmental Dynamics, and Key Laboratory of Marine Bio-resources Sustainable Utilization, China DL Tang --- Key Laboratory of Tropical Marine Environmental Dynamics, and Key Laboratory of Marine Bio-resources Sustainable Utilization, China SF Wang --- Key Laboratory of Tropical Marine Environmental Dynamics, and Key Laboratory of Marine Bio-resources Sustainable Utilization, China L Nguyen-Ngoc --- , Vietnam
    The study investigated the spatial and temporal variations of harmful algal bloom (HAB) species in the western South China Sea (SCS) for the period 1993-2007, using in situ HAB and remotely sensed datasets. A significant change in the dominant bloom...
  21. A multi-centre, phase IV study to evaluate the steady-state plasma concentration and serum bactericidal activity of a generic teicoplanin preparation

    A multi-centre, phase IV study to evaluate the steady-state plasma concentration and serum bactericidal activity of a generic teicoplanin preparation

    Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Oppel Greeff --- Department of Pharmacology, School of Medicine, Faculty of Health Sciences, South Africa Jacob van Tonder --- Department of Pharmacology, School of Medicine, Faculty of Health Sciences, South Africa Duncan Cromarty --- Department of Pharmacology, School of Medicine, Faculty of Health Sciences, South Africa Warren Lowman --- Department of Clinical Microbiology and Infectious Diseases, School of Pathology, South Africa Piet Becker --- Faculty of Health Sciences, South Africa Margo Nell --- Department of Pharmacology, School of Medicine, Faculty of Health Sciences, South Africa
    Introduction: Teicoplanin is an effective treatment option against methicillin-resistant, Gram-positive bacteria, like Staphylococcus aureus. It is a glycopeptide antibiotic, produced through microbial fermentation, a process resulting in variations in the N-acyl side chain. Concerns that these variations may affect the...
  22. Development and characterisation of a modified multi-purpose pine oil detergent for a small-scale manufacturer in Lesotho

    Development and characterisation of a modified multi-purpose pine oil detergent for a small-scale manufacturer in Lesotho

    Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mosotho George --- Chemistry and Chemical Technology, Lesotho Ts'ukulu Motsamai --- Chemistry and Chemical Technology, Lesotho
    The interest in small-scale manufacturing of simple products seems to be growing in Lesotho. However, this could have undesirable effects without insights into the chemical processes involved in such presumed simple processes. This manuscript reports the partnership between the National...
  23. The number of stocks required for effective portfolio diversification: the South African case

    The number of stocks required for effective portfolio diversification: the South African case

    Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: David Bradfield --- Department of Statistical Sciences, South Africa Brian Munro --- Multi Asset Department, Cadiz Asset Management, South Africa
    This article considers several insights surrounding the number of stocks needed in portfolios in South Africa to achieve effective risk reduction. The majority of studies in the literature use equally-weighted portfolio construction schemes and conclude that at most 20 stocks...
  24. Organochlorine pesticides in <em>Cyprinus carpio</em> from Sidi Salem Dam, north-western Tunisia

    Organochlorine pesticides in Cyprinus carpio from Sidi Salem Dam, north-western Tunisia

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Mzoughi --- Institut National des Sciences et Technologies de la Mer, Laboratoire Milieu Marin, R Ennouri --- Institut National des Sciences et Technologies de la Mer, Laboratoire Milieu Marin, L Chouba --- Institut National des Sciences et Technologies de la Mer, Laboratoire Milieu Marin,
    Cyprinus carpio (Linnaeus, 1758) caught in Sidi Salem Dam in 2011 were analysed for the levels of organochlorine pesticides (OCPs), including hexachlorobenzene (HCB), aldrin, heptachlor, lindane, dieldrin, endrin, and pp′-DDT and its two main metabolites pp′-DDD and pp′-DDE, in order...
  25. Variations in water and macronutrient uptake of soilless tomato as affected by the nutrient solution composition

    Variations in water and macronutrient uptake of soilless tomato as affected by the nutrient solution composition

    Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Estelle Kempen --- Department of Agronomy, South Africa G André Agenbag --- Department of Agronomy, South Africa Stan Deckers --- Soil Service of Belgium, Belgium
    Greenhouse growers must reduce the nutrients that leach from soilless growing systems. To enable continued use of nutrient solutions, the water and nutrient uptake by plants in soilless systems needs to be quantified. Plants were grown in water culture with...
  26. Photosynthesis versus irradiance relationships in the Atlantic sector of the Southern Ocean

    Photosynthesis versus irradiance relationships in the Atlantic sector of the Southern Ocean

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Thomalla --- Ocean Systems and Climate Group, South Africa E Kean --- Biological Sciences Department, South Africa M Lucas --- Biological Sciences Department, South Africa M-J Gibberd --- Biological Sciences Department, South Africa R Barlow --- Department of Oceanography, South Africa
    Eleven incubation experiments were conducted in the South Atlantic sector of the Southern Ocean to investigate the relationship between new production (ρNO–3), regenerated production (ρNH+4), and total carbon production (ρC) as a function of varying light. The results show substantial...
  27. The herding behaviour and announcement of insider transfer trading: A study in Taiwan

    The herding behaviour and announcement of insider transfer trading: A study in Taiwan

    Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Fu Shuen Shie --- Department of Finance, Taiwan Chiao Yi Chang --- Department of Insurance and Finance, Taiwan
    The present paper examines the influence of herding behaviour on the market response to insider transfer trades under different levels of ownership concentration. The results show that the three-day waiting period for executing insider transfer trades that is uniquely required...
  28. Heavy metal concentrations in, and human health risk assessment of, three commercially valuable fish species in the lower Niger River, Nigeria

    Heavy metal concentrations in, and human health risk assessment of, three commercially valuable fish species in the lower Niger River, Nigeria

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JC Madu --- Department of Zoology and Environmental Biology, Nigeria GE Odo --- Department of Zoology and Environmental Biology, Nigeria CN Asogwa --- Department of Zoology and Environmental Biology, Nigeria CD Nwani --- Department of Zoology and Environmental Biology, Nigeria
    The concentrations of Fe, Mn, Ni, Pb and V in water, sediment and the gill, liver and muscle tissues of Synodontis resupinatus, Heterotis niloticus and Clarias gariepinus, all commercially important fish species of the lower Niger River, were investigated in...
  29. Medico-legal aspects regarding drunk driving: experience and competency in practice of community service doctors

    Medico-legal aspects regarding drunk driving: experience and competency in practice of community service doctors

    Item type: Journal Article • Journal: South African Family Practice • Authors: L Fouché --- Division Health Sciences Education, Office of the Dean, South Africa J Bezuidenhout --- Division Health Sciences Education, Office of the Dean, South Africa C Liebenberg --- Department of Forensic Medicine, School of Medicine, South Africa AO Adefuye --- Division Health Sciences Education, Office of the Dean, South Africa
    Background: Drunk driving has been reported to increase the risk of road traffic accidents associated with death and severe injury. In South Africa, an increase in blood alcohol concentration of as little as 0.01 g per 100 ml above the legal limit...
  30. Assessment of heavy metals in foods and adult dietary intake estimates

    Assessment of heavy metals in foods and adult dietary intake estimates

    Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Vincent O. Adimula --- Department of Industrial Chemistry, Nigeria Percy C. Onianwa --- Department of Chemistry, Nigeria Omolola Ilupeju --- Department of Chemistry, Nigeria Eric Ayom --- Department of Chemistry, Nigeria Alafara A. Baba --- Department of Industrial Chemistry, Nigeria
    Levels of some heavy metals were investigated in 114 snack samples consumed in Ibadan city, Nigeria. The concentrations of the selected metals were observed to range widely in the sampled food snacks: cadmium (0.004 to 0.892 mg/kg), cobalt (0.090 to 0.797 mg/kg),...
  31. Iodine status of pregnant women and children age 6 to 12 years feeding from the same food basket in Mopani district, Limpopo province, South Africa

    Iodine status of pregnant women and children age 6 to 12 years feeding from the same food basket in Mopani district, Limpopo province, South Africa

    Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: E Mabasa --- School of Health Sciences, Department of Nutrition, South Africa NS Mabapa --- School of Health Sciences, Department of Nutrition, South Africa PL Jooste --- Iodine Global Network, Southern Africa XG Mbhenyane --- Division of Human Nutrition, Department of Interdisciplinary Health sciences, South Africa
    Objectives: The aim of the study was to assess the iodine status of pregnant women and children age 6 to 12 years feeding from the same food basket in Mopani District.
  32. Addressing education inequality in sub-Saharan Africa<xref ref-type="fn" rid="FN0000"/>

    Addressing education inequality in sub-Saharan Africa

    Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Folorunso Obayemi Temitope Obasuyi --- Department of Development Studies, Malaysia Rajah Rasiah --- Asia-Europe Institute, University of Malaya, Malaysia
    This paper examines the impact of wealth inequality on education inequality in the sub-Saharan African (SSA) countries, including by decomposing inequality across gender. Specifically, it analyzes the impact of wealth concentration on the distribution of educational attainment using a sample...
  33. Reliability and quality of artificial nectar feeders for birds in the Cape Floristic Region

    Reliability and quality of artificial nectar feeders for birds in the Cape Floristic Region

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Anina Coetzee --- , South Africa Phoebe Barnard --- , South Africa Anton Pauw --- , South Africa
    Supplementary feeding of birds may have considerable ecological and evolutionary effects on bird communities. However, there is a lack of basic information on the prevalence, frequency and quality of supplementary feeders, especially in African urban areas. Here we describe the...
  34. Microplastics pollution in the sediments of creeks and estuaries of Kenya, western Indian Ocean

    Microplastics pollution in the sediments of creeks and estuaries of Kenya, western Indian Ocean

    Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JO Kerubo --- , Kenya AWN Muthumbi --- , Kenya JM Onyari --- , Kenya D Robertson-Andersson --- , South Africa E Kimani --- , Kenya
    Microplastic pollution has been recognised as a global threat in marine environments and a danger to prey, predators and humans. Yet, there have been few studies in the western Indian Ocean, specifically along the Kenyan coast, which makes it difficult...
  35. Endogenous metabolic content of the cutting positions and ndole-3-butyric acid influence rooting of <em>Toona ciliata</em> var. <em>pubescens</em> stem cuttings

    Endogenous metabolic content of the cutting positions and ndole-3-butyric acid influence rooting of Toona ciliata var. pubescens stem cuttings

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Qiangqiang Cheng --- , China Dejia Ji --- , China Xiaoyan Guo --- , China Honglang Huang --- , China Lu Zhang --- , China
    Toona ciliata var. pubescens (family Meliaceae) is an endangered species of mahogany endemic to China. It is now under Class II protection, and stem cuttings are an important means for its clonal propagation. However, the metabolic changes that occur in...
  36. Forage legumes from the Mediterranean Fynbos biome of South Africa with potential for domestication: slope aspect affects tissue fibre and mineral composition

    Forage legumes from the Mediterranean Fynbos biome of South Africa with potential for domestication: slope aspect affects tissue fibre and mineral composition

    Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Samson BM Chimphango --- , South Africa Luke H Gallant --- , South Africa M Igshaan Samuels --- , South Africa Odette E Curtis-Scott --- , South Africa A Muthama Muasya --- , South Africa Clement Cupido --- , South Africa James S Boatwright --- , South Africa John Howieson --- , Australia
    Fabaceae plants contribute greatly to a high quality of pasture in rangelands, because of high levels of protein in their tissues. Despite this established importance, only a few southern African legumes have been evaluated for nutritional value and domestication. The...
  37. Global concentration of wood-pulp production, 1961–2021

    Global concentration of wood-pulp production, 1961–2021

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Luiz Moreira Coelho Junior --- Federal University of Paraiba, Brazil Thaisa de Sousa Selvatti --- Federal University of Lavras, Brazil Filipe Vanderlei Alencar --- Federal University of Paraiba, Brazil Anna Manuella Melo Nunes --- Federal University of Paraiba, Brazil Maisa Santos Joaquim --- Universidade de Brasilia, Brazil Edvaldo Pereira Santos Júnior --- Federal University of Paraiba, Brazil Alvaro Nogueira de Souza --- Universidade de Brasilia, Brazil
    Wood pulp is one of the main products of forestry worldwide, being a necessary intermediate product for all types of paper produced. In order to understand the market dynamics of this product, this study analyses the global concentration of the...
  38. Eliahou number, Wilf function and concentration of a numerical semigroup

    Eliahou number, Wilf function and concentration of a numerical semigroup

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Patricio Almirón --- Universidad Complutense de Madrid, Spain Julio José Moyano-Fernández --- Departamento de Matemáticas & Institut Universitari de Matemátiques i Aplicacions de Castelló, Spain
    We give an estimate of the minimal positive value of the Wilf function of a numerical semigroup in terms of its concentration. We describe necessary conditions for a numerical semigroup to have a negative Eliahou number in terms of its...
  39. The birth of <em>Boererate</em>: women and healing during the South African war

    The birth of Boererate: women and healing during the South African war

    Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Jeanie Blackbeard --- University of Pretoria, South Africa Fraser G. McNeill --- University of Pretoria, South Africa
    This article reinterprets historical works on the history of medicine in South Africa and how present-day Afrikaner home-based healing therapies known as Boererate engage with this history. By reinterpreting historical sources, we illustrate how Boer women in concentration camps during...
  40. Variations and extensions of the Gaussian concentration inequality, Part I

    Variations and extensions of the Gaussian concentration inequality, Part I

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Daniel J. Fresen --- University of Pretoria, South Africa
    The classical Gaussian concentration inequality for Lipschitz functions is adapted to a setting where the classical assumptions (i.e. Lipschitz and Gaussian) are not met. The theory is more direct than much of the existing theory designed to handle related generalizations...
  41. The cumulative prospect theory and fund flows in emerging markets

    The cumulative prospect theory and fund flows in emerging markets

    Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Amit Pandey --- Indian Institute of Technology Roorkee, India Anil Kumar Sharma --- Indian Institute of Technology Roorkee, India
    This study is the first to examine the efficacy of the Cumulative Prospect Theory value of the past return (CPTV) to explain fund flow in emerging markets funds by considering the impact of fund managers’ characteristics and behavioural biases on...
  42. Concentration and cavitation in the Riemann solution for the relativistic Euler equations with non-ideal isothermal dusty gas

    Concentration and cavitation in the Riemann solution for the relativistic Euler equations with non-ideal isothermal dusty gas

    Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bencui Shan --- Yunnan Normal University, P.R. China Yanyan Zhang --- Xinyang Normal University, P.R. China Yu Zhang --- Yunnan Normal University, P.R. China
    The phenomena of concentration and cavitation in the Riemann solutions of the relativistic Euler equations with non-ideal isothermal dusty gas are considered. The Riemann problem is solved first, and the solutions consisting of rarefaction waves and shock waves are obtained...