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The Educational Journal

In situ feeding rates of the copepods, Pseudodiaptomus hessei and Acartia longipatella, in a temperate, temporarily open/closed Eastern Cape estuary

  • Authors: Froneman, P William
  • Date: 2004
  • Language: English
  • Type: text , Article
  • Identifier: vital:6901 , http://hdl.handle.net/10962/d1011754
  • Description: Size-fractionated chlorophyll-a (chl-a) concentrations and the in situ grazing rates of the copepods, Pseudodiaptomus hessei and Acartia longipatella, were assessed seasonally at the temporarily open/closed Kasouga estuary situated along the southeast coast of southern Africa. Total integrated chl-a concentration ranged between 1.17 and 12.18 mg chl-a m^(–3) and was always dominated by small phytoplankton cells (<20 μm), which comprised up to 86% (range 64–86%) of the total pigment. Total zooplankton abundance ranged between 2676 and 62 043 individuals m^(–3). These copepods numerically dominated the zooplankton counts, accounting for between 79% and 91% of the total. Gut pigment concentrations of the two species at night were significantly higher than the daytime values (P<0.05 in all cases). The observed pattern could be related to the marked diurnal vertical migration patterns exhibited by the copepods. Gut evacuation rates of P. hessei during the study ranged between 0.29 and 0.77 h^(–1) and between 0.39 and 0.58 h^(–1) for A. longipatella. The rate of gut pigment destruction for P. hessei and A. longipatella ranged between 55% and 81% and between 88% and 92% of the total chl-a ingested, respectively. The combined grazing impact of the two copepods ranged between 0.65 and 4.37 mg chl-a m^(–3), or between 4.3% and 35.9% of the available chl-a in the water column. Variations in the grazing activity of the two species could be attributed largely to seasonality in water temperature and shifts in the phytoplankton community structure and zooplankton abundance.
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  • Date Issued: 2004

Crime travel: a survey of representations of transnational crime in South African crime fiction

  • Authors: Naidu, Samantha
  • Date: 2016
  • Language: English
  • Type: Article
  • Identifier: vital:26347 , http://hdl.handle.net/10962/53900 , http://jcpcsonline.com/ , https://orcid.org/0000-0001-9456-8657
  • Description: The literatures, the histories, the politics, and the arts whose focus, locales, or subjects involve Britain and other European countries and their former colonies, the now decolonized, independent nations in the Americas, Africa, Asia, and the Caribbean, and also Australia, Canada, Ireland, and New Zealand.
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  • Date Issued: 2016

The structure of aliphatic amine adducts of uranyl acetylacetonate. III. Dioxobis(2,4-pentanedionato)mono (2-N-isopropylaminopentan-4-one)uranium(VI)

  • Authors: Rodgers, A L , Nassimbeni, L R , Haigh, John M
  • Date: 1977
  • Language: English
  • Type: text , Article
  • Identifier: vital:6419 , http://hdl.handle.net/10962/d1006552
  • Description: Introduction: In two earlier structural determinations of compounds of this type we have shown that the conformation of the adduct moiety is dependent on the formation of intramolecular N-H...0 hydrogen bonds (part I: Haigh, Nassimbeni, Pauptit, Rodgers & Sheldrick, 1976; part II: Nassimbeni, Orpen, Pauptit, Rodgers & Haigh, 1977). We have carried out the present analysis to study the conformational effects on the ligand brought about by the steric influence of an isopropyl substituent at N.
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  • Date Issued: 1977

The poetry of Guy Butler

  • Authors: Maclennan, D A C
  • Date: 2005
  • Language: English
  • Type: Article
  • Identifier: vital:6119 , http://hdl.handle.net/10962/d1004673
  • Description: [From the introduction]: Guy Butler, born in Cradock on 21 January 1918, was a serious poet. Nearly a third of his poems are about death or loss, and many of the rest about parting failure, or difficult self-denial. His poetry is generally thoughtful and responsible to a deep religious vision. Of the ninety poems published between 1939 and 1979 the finest are those written between 1943 and 1963, from “Syrian Spring” to “Sweetwater.” The best poems cluster like moons round “On First Seeing Florence,” which is a major poem seldom given its rightful attention.
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  • Date Issued: 2005

APDUSA Views

The role of quality of life surveys in managing change in democratic transitions: the South African case

  • Authors: Moller, Valerie , Dickow, H
  • Date: 2002
  • Language: English
  • Type: Article
  • Identifier: vital:7115 , http://hdl.handle.net/10962/d1010748
  • Description: The South African Quality of Life Project has tracked subjective well-being, life satisfaction and happiness, since the early eighties at the national level. In most democratic countries around the globe, the average citizen says he or she is satisfied with life in general. In South Africa this is not the case. Since the early 1980s, the trend study shows up disparities between one sector of the South African population that is satisfied with life in general and various aspects of life and another sector that is very dissatisfied. Generally, the better-off report higher levels of satisfaction and happiness than the worse-off. The most plausible explanation for the South African quality-of-life constellation is the huge gap in living standards between rich and poor, a legacy of the apartheid era, which discriminated against blacks and to a lesser extent against Indian and coloured people. Euphoria following on the first democratic elections in April 1994, which registered equally high aggregate levels of happiness and life satisfaction among all sectors of the population, was short-lived. Under democracy, expectations “for a better life for all”, the election slogans for the 1994 and 1999 general elections, has risen. South Africa has one of the most enlightened constitutions, which guarantees basic human rights and supports advancement of the previously disadvantaged. As long as South Africans perceive barriers to accessing the material rewards of democracy, they do not see justice has been done. South Africa is currently grappling with problems common to other societies in transition to democracy. Since 1994, government programmes and policies have been devised to address the critical twin problems of poverty and inequality in society. The latest round of research for the South African Quality of Life Trends Project probes popular assessments of the policies and programmes aimed at improving the quality of life of ordinary South Africans. Interviews with a panel of 25 opinion leaders in the run-up to the June 1999 general elections were followed by a nationally representative opinion survey in October 1999. The paper outlines the role of social indicators in monitoring quality of life in South Africa and reports findings from the elite and rank-and-file surveys. Generally, the winners and losers in the new political dispensation see changes from a different perspective. The disadvantaged are more likely to have seen material gains and recommend increased delivery of services and opportunities for social mobility. The advantaged, who have mainly experienced non-material or no gains since 1994, are more likely to be pessimistic about the future. It is concluded that the groundswell of optimism will sustain the majority of South Africans who are still dissatisfied with life until their dreams of the good life are fulfilled.
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  • Date Issued: 2002

The Educational Journal

  • Date: 2006-09
  • Subjects: Education – South Africa , South Africa – Social conditions , South Africa – Economic conditions
  • Language: English
  • Type: text , Article
  • Identifier: http://hdl.handle.net/10948/41199 , vital:36400 , Bulk File 7
  • Description: The Educational Journal was the official organ of the Teachers' League of South Africa and focussed on education within the context of a racialized South Africa. From the 2000s, the journal was published by the National Union of Public Service and Allied Workers (NUPSAW), a trade union formed in August 1998 from the amalgamation of militant and moderate trade unions and also operated in the education sphere.
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  • Date Issued: 2006-09

The Educational Journal

Iris colour in passerine birds: why be bright-eyed?

  • Authors: Craig, Adrian J F K , Hulley, Patrick E
  • Date: 2004
  • Language: English
  • Type: Article
  • Identifier: vital:6902 , http://hdl.handle.net/10962/d1011756
  • Description: An initial survey of iris coloration in passerine birds (Aves: Passeriformes) showed that a brightly pigmented iris is much more common in southern African and Australian birds than in those from Europe, temperate North America, and Venezuela. However, the only statistical correlation reflected the distribution of particular bird families in these regions. Ten family-level groups considered to represent monophyletic taxa were then selected for a more detailed analysis, comparing iris coloration with distribution, status, taxonomy, plumage patterns, and some biological and behavioural characters for 1143 species. No pattern associating iris colour with particular traits was common to all families, but within families there were statistically significant associations with both plumage and biology. Our expectation that social behaviour would be an important predictor of iris colour was not supported, but critical information is still lacking for many species. Future studies of avian behavioural ecology should examine critically the role of iris coloration in individual species. , Rhodes Centenary issue
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  • Date Issued: 2004

Chris McGregor's death: A breath of brotherhood

The effect of physico-chemical parameters and chemical compounds on the activity of β-d-galactosidase (B-GAL), a marker enzyme for indicator microorganisms in water

  • Authors: Wutor, V C , Togo, C A
  • Date: 2007
  • Language: English
  • Type: text , Article
  • Identifier: vital:6470 , http://hdl.handle.net/10962/d1005800 , https://doi.org/10.1016/j.chemosphere.2007.02.050
  • Description: The presence of coliforms in polluted water was determined enzymatically (in situ) by directly monitoring the activity of beta-d-galactosidase (B-GAL) through the hydrolysis of the yellow chromogenic subtrate, chlorophenol red beta-d-galactopyranoside (CPRG), which produced a red chlorophenol red (CPR) product. The objectives of this study were to monitor the effect of compounds commonly found in the environment and used in water treatment on a B-GAL CPRG assay and to investigate the differences between the environmental B-GAL enzyme and the pure commercial enzyme. Environmental B-GAL was optimally active at pH 7.8. Two temperature optima were observed at 35 and 55 degrees C, respectively. B-GAL activity was strongly inhibited by silver and copper ions. While calcium and ferrous ions at lower concentrations (50-100mgl(-1)) increased the enzyme activity, a reduction was observed at higher concentrations (200mgl(-1)). Sodium hypochlorite, normally used in rural areas to disinfect water gradually decreased B-GAL activity at concentrations between 0 and 5600ppm for both the commercial and environmental enzymes. B-GAL from the environment behaved differently from its commercially available counterpart.
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  • Date Issued: 2007

Compositional varition of the Essential Oils of Artemisia afra Jacq. from three Provinces in South Africa- A Case Study of its safety

  • Authors: Oyedeji, O A , Afolayan, A J , Hutchings, A
  • Date: 2009
  • Language: English
  • Type: text , Article
  • Identifier: http://hdl.handle.net/11260/748 , vital:29679
  • Description: In South Africa, Centella asiatica. (L.) Urb is used traditionally for the treatment of various diseases. Analyses of the essential oil of this medicinal plant revealed 11 monoterpenoid hydrocarbons (20.20%), nine oxygenated monoterpenoids (5.46%), 14 sesquiterpenoid hydrocarbons (68.80%), five oxygenated sesquiterpenoids (3.90%), and one sulfide sesquiterpenoid (0.76%). α.-Humulene (21.06%), β.-caryophyllene (19.08%), bicyclogermacrene (11.22%), germacrene B (6.29%), and myrcene (6.55%) were the predominant constitutes. The essential oil extract exhibited a broad spectrum of antibacterial activities against Gram-positive (Bacillus subtilis, Staphylococcus aureus.) and Gram-negative (Escherichia coli, Pseudomonas aeruginosa, Shigella sonnei.) organisms.
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  • Date Issued: 2009

Fluvial conditions during the Holocene as evidenced by alluvial sediments from above Howison's Poort, near Grahamstown, South Africa

  • Authors: Lewis, Colin A , Illgner, Peter M
  • Date: 1998
  • Language: English
  • Type: Article
  • Identifier: vital:6697 , http://hdl.handle.net/10962/d1006733
  • Description: Mapping and analyses of alluvial sediments in the Berg River valley, near Grahamstown, has resulted in the identification of over 5 000 years of environmental stability in the early Holocene, in which flood plain sediments accumulated. Subsequent to 4390±90 BP environmental instability, probably due to climatic fluctuations, resulted in the formation of river terraces. Further research is needed to establish the area! limits of this sequence of Holocene climatic and environmental events.
  • Full Text: false
  • Date Issued: 1998

Diary

  • Authors: Taylor, Laurie
  • Language: English
  • Type: Article
  • Identifier: vital:13657 , http://hdl.handle.net/10962/d1012568
  • Description: Photocopied article from the newspaper New Statesman and Society about the new formation of the Brotherhood of Breath after the death of three of the key members Chris McGregor, Dudu Pukwana and Johnny Dyani.
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French Research Director visits Rhodes

  • Authors: Phiri, Aretha
  • Date: 2008
  • Language: English
  • Type: Article
  • Identifier: vital:7209 , http://hdl.handle.net/10962/d1006415
  • Description: Dr Fethi Bedioui, a research director from the Centre National de la Recherche Scientifique (CNRS) in Paris, recently spent two weeks in the Department of Chemistry working with Professor Tebello Nyokong's research group.
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  • Date Issued: 2008

Science after a century at Rhodes University

  • Authors: Woods, D R
  • Date: 2004
  • Language: English
  • Type: Article , text
  • Identifier: vital:7123 , http://hdl.handle.net/10962/d1006584
  • Description: Rhodes Centenary issue , The small University of Rhodes (6142 students), in the rural city of Grahamstown, was established in 1904 as a result of a £50 000 grant from the Rhodes Trust in Oxford. It grew out of St Andrew’s College, which provided the first four professors and 41 students. The first paper from Rhodes in the South African Journal of Science (then called the Report of the South African Association for the Advancement of Science) was by Selmar Schonland, one of the university’s founding fathers. Entitled: ‘Biological and ethnological observations on a trip to the N.E. Kalahari’, it appeared in 1904. The following pages provide a glimpse into the growth and achievements of various departments in the faculties of Science and Pharmacy and associated institutes a century after the university was born.
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  • Date Issued: 2004

Anton and Vale van der Merwe: reinterpreting Afro-Oriental studio ceramics traditions in South Africa

  • Authors: Steele, John
  • Date: 2015
  • Language: English
  • Type: text , Article
  • Identifier: http://hdl.handle.net/11260/968 , vital:30077
  • Description: Growing awareness of ancient Chinese Song and Yuan ceramics, amongst other Oriental traditions, by people with western connections such as Bernard Leach and Michael Cardew, in conjunction with influences from Japanese associates such as Soyetsu Yanagi, Kenkichi Tomimoto, and Shoji Hamada, (De Waal 1997, Harrod 2012, Kikuchi 1977, Leach 1976) has had many consequences. It spread a consciousness idealizing self-sufficient pottery studios where potters were in touch with all aspects of creating utilityware, largely from local materials for local use. Out of this emerged an Anglo-Oriental studio ceramic philosophy of form and practice, associated mainly with hand-made high temperature reduction fired ceramics. These ideas spread to South Africa in the late 1950s, and by the early 1960s local studios were being established along these lines. This studio ceramics movement grew exponentially in South Africa, initiating a phase of Afro-Oriental ceramics that remains a powerful way of life and visual arts influence. This paper seeks to explore aspects of Afro- Oriental studio ceramics in South Africa, with particular reference to the Leach/Hamada/Cardew to Rabinowitz, and Van der Merwe lineage.
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  • Date Issued: 2015

Load stress; carrier strain: implications for military and receational backpacking

  • Authors: Charteris, J
  • Date: 2007
  • Language: English
  • Type: Article
  • Identifier: vital:6754 , http://hdl.handle.net/10962/d1009456
  • Description: This paper reviews a growing literature on the stress of backpacking, particularly in military situations. Conceptual issues are raised and the implications for recreational backpackers are addressed. Under moderate to fairly heavy loading the energy cost, per kg total load carried, per hour, relates almost linearly to walking speed. Empirical data from studies in this unit are presented as benchmark indicators for use by recreational backpackers.
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  • Date Issued: 2007

The Educational Journal

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