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Evaluation of a 'defouling on demand' strategy for the ultrafiltration of brown water using activatable enzymes

- Buchanan, K

  • Authors: Buchanan, K
  • Date: 1999
  • Subjects: Water -- Purification , Ultrafiltration , Enzymes , Membranes (Technology)
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:3904 , http://hdl.handle.net/10962/d1003963 , Water -- Purification , Ultrafiltration , Enzymes , Membranes (Technology)
  • Description: New approaches to the application of membranes for the production of potable water are constantly being sought after in anticipation of future demands for increasingly rigorous water quality standards and reduced environmental impact. A major limitation, however, is membrane fouling, which manifests itself as a continual reduction in flux over time and thus restricts the practical implementation to restore flux. Mechanical and chemical methods have been implemented to restore flux to ultrafiltration systems, but these either result in a break in the process operation or lead to membrane damage or additional pollution problems. This project was aimed to develop a 'defouling on demand' stategy for cleaning membranes used during brown water ultrafiltration. The process involves the use of activatable peroxidase enzymes, which were immobilised onto flat sheet polysulphone membranes. Following flux decline which reaches a critical level with the build-up of the foulant layer, the immobilised enzyme layer was activated by the addition of a chemical activator solution, in this case hydrogen peroxidase and manganous sulphate. Manganese peroxidase was found to be the most effective enzyme at alleviating fouling by degrading the foulant layer formed on the membrane surface and hence restored flux to the ultrafiltration system. A 93% flux improvement was observed when manganese peroxidase was activated when 800uM manganous sulphate, 100mM hydrogen peroxide were added in the presence of a manganese chelator, lactate. The concept and the potential benefits this system holds will be discussed in further detail.
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  • Date Issued: 1999

Experiencing space and place in Grahamstown's informal settlements

- Coetzee, Jan K, Houssay-Holzschuch, Myriam, O'Reilly, Caroline

  • Authors: Coetzee, Jan K , Houssay-Holzschuch, Myriam , O'Reilly, Caroline
  • Date: 1999
  • Subjects: Black people -- housing -- South Africa -- South Africa -- Grahamstown Squatter settlements -- South Africa -- Grahamstown Squatters -- South Africa -- Grahamstown -- interviews
  • Language: English
  • Type: Book , Text
  • Identifier: http://hdl.handle.net/10962/2623 , vital:20310 , ISBN 0868103616
  • Description: In this research the relationship between people and the space they occupy will be looked at. In doing so, we shall see how people enter into a relationship with their environment in order to create out of material at their disposal, a shelter wherein they can live. By erecting a structure which serves as a house, the people involved in this project do essentially the same as other people in other parts of the world, who create a dwelling that provides protection against the climate and the elements in nature. A question to be raised, is extent their (i.e. the people involved in this project) entering into a relationship with their environment, was forced into a particular direction because of a set of political and economic factors. What are the political and economic factors which impact on the manner of building houses in the informal residential areas of Grahamstown? Traditional housing in France, for example, differs from region to region and has been shaped over long periods of time by the climate, family structures, the availability of land, modes of production, etc. One finds that large vine-growing families from the Mediterranean South of France live in fairly big villages; individual farmers of Brittany dwell in small, slate-roofed houses which are isolated among enclosed fields; pastoral communities in the Alps undertake seasonal moves up or down the slopes of the mountains and share their space during winter with their cattle. The way in which these families and/or communities have come to shape their lifeworlds, was not exposed to the same kind of determining factors as, for instance, in South Africa in general and in Grahamstown in particular. Notwithstanding political and economic determinants, it is clear that residents of informal houses in the Grahamstown area draw to a large extent from tradition with regards to the kind of shelters which they build (cf. the many mud-and-stick constructions). Similarly the settlement of people impacts on nature. Elements of the environment inform certain choices, but people interpret their natural environment and will erect shelters in terms of these interpretations. In addition there are the issues of how people orientate themselves in terms of important landmarks, what kind of representation they have of the future they are moving towards and which values do they draw from or attribute to their physical environment. The landscape surrounding people, contains and reflects cultural information. Important landmarks express aspects of life: the past, the present and the future. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
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  • Date Issued: 1999

Exploring new terrain - tackling a tri-media approach to the 1999 election: an analysis of online coverage of elections by media organisations in their respective countries and recommendations for multi-platform publishing within the South African Broadcasting Corporation to cover the national election

- Naidoo, Kameshnee

  • Authors: Naidoo, Kameshnee
  • Date: 1999
  • Subjects: South African Broadcasting Corporation , Elections , Journalism -- Political aspects -- South Africa , Mass media -- Political aspects -- South Africa , Internet , Electronic news gathering , Television broadcasting of news -- Political aspects
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:3473 , http://hdl.handle.net/10962/d1002928 , South African Broadcasting Corporation , Elections , Journalism -- Political aspects -- South Africa , Mass media -- Political aspects -- South Africa , Internet , Electronic news gathering , Television broadcasting of news -- Political aspects
  • Description: This study attempts to analyse the way foreign media organisations have used the Internet to inform, educate and mobilise citizens for participation in their national election. These foreign experiences provide a framework with which to analyse the implications for the SABC as a public broadcaster of the next elections in South Africa. The research was informed by theories of media and democracy. One of the most powerful features of the new technology is its technical ability to facilitate an interactive flow of information. This research examines the concept of cyberdemocracy and the implications for the SABC, especially as it is planning on launching an online election strategy. The democratic roles of journalism and the implications for the SABC are also discussed. As a public service broadcaster, the SABC is bound to educate, inform, and mobilise voters for participation, build community and national identity and scrutinise the poll in the interests of transparency, accountability and fair play. International journalists are advocating a new type of journalism, called public or civic journalism, which combines these roles. This research draws primarily on qualitative research methods, using a case study methodology. It draws upon direct observation and interview methodology in the fieldwork. However, it also uses some quantitative methods in the analysis of the websites and the SABC research.Finally, the research analyses the situation at the SABC and provides recommendations for the election website within this context.
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  • Date Issued: 1999

Fali

- Amy Koita (lead vocal, author, composer, arranger), Allhassane Soumano (author, composer, arranger), Moussa, Sidi Mady Gilbert (bass guitar), Zakaria, Djekoria Mory, Cissoko (solo and accompanying guitar), Sekouba, Aboubacar (percussion), Balake Cissoko (kora), Maimouna Barry, Olisa (chorus), Thomas, Didier Deuirus, Manou Yodan (brass), Makan Tounkara (n'goni), Samir Naman

Farming against the odds : an examination of the challenges facing farming and rural development in the Eastern Cape province of South Africa

- Nel, Etienne L, Davies, J

  • Authors: Nel, Etienne L , Davies, J
  • Date: 1999
  • Language: English
  • Type: Article
  • Identifier: vital:6715 , http://hdl.handle.net/10962/d1006788
  • Description: Recent political transformation in South Africa has laid the basis for significant socioeconomic change. One area in which the greatest socioeconomic disparities are discernable is the agricultural sector and rural development in general. Through the medium of a case study of the Eastern Cape province, the obstacles and opportunities facing the two predominant farming groups —emerging black small-scale farmers and white commercial farmers — are examined. The paper concludes with an examination of the economic potential of the former ‘white' areas to sustain the resettlement of people previously excluded from that land market on racial grounds.
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  • Date Issued: 1999

Fatalite

- Rokia Traore (vocals, guitar, lyrics, composition), Andra Kouyate, Baba Sissoko (n'goni), Oumar Diallo, Abdoul W. Berthe (bass guitar), Samba Diarra (balafon), Dimba Camara, Souleymane Ann (percussion, gita), Baba Sissoko (djembe), Samir Naman

Fidi

- Amadou Sodia (lead singer, bolon, kora), Hadja Maningbe, Djanka Diabate, Awa Maiga, Valerie Belinga (chorus), Ansoumane Kante, Yeye (percussions), Adama Drame (guitar solo), Alpha Camara (congas), Ousmane Kouyate, Djely Moussa Kouyate,Manfila Kante (guitar), Djessou Mory (rythm guitar, solo), Brass: Christian Martinez (trumpet), Bernard Camoin (trombone), Thierry Farrugia (saxophone), Phillipe Guez (arrangement, keyboard), Patrick Mareck

Finini

- Rokia Traore (vocals, guitar, lyrics, composition), Andra Kouyate, Baba Sissoko (n'goni), Oumar Diallo, Abdoul W. Berthe (bass guitar), Samba Diarra (balafon), Dimba Camara, Souleymane Ann (percussion, gita), Baba Sissoko (djembe), Samir Naman

Fish population dynamics in a temporarily open/closed South African estuary

- Cowley, Paul D (Paul Denfer), 1964-

  • Authors: Cowley, Paul D (Paul Denfer), 1964-
  • Date: 1999
  • Subjects: Fish populations Estuarine ecology -- South Africa -- Eastern Cape Estuarine fishes -- Ecology -- South Africa Fish populations -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5354 , http://hdl.handle.net/10962/d1008543
  • Description: The primary aim of this study was to investigate the population dynamics of the fishes associated with a small (17.5 hectares) temporarily open/closed estuary on the south east coast of South Africa. The results are based on the findings of an intensive sampling programme conducted over a period of four years in the East Kleinemonde estuary (33° 32' S : 27° 03' E). By adopting a quantitative approach, this study addresses the need for information on estuarine-associated fish population sizes, standing stock (biomass) estimates and productivity. The ichthyoplankton assemblage in the surf zone adjacent to the mouth of the estuary was dominated by postflexion larvae representing at least 21 taxa in 14 families. Rhabdosargus holubi of sizes ranging between 9 mm and 21 mm BL was the most abundant species with a mean density of 7.3 individuals per 100 m'. This species, which accounted for 77.6% of the catch composition, was recorded throughout the year but revealed a distinct peak in abundance in spring (August - September). The ichthyofaunal community within the East Kleinemonde estuary was dominated by juvenile marine-spawning species and typical of a warm temperate southern African estuary. A total of 30 species in 17 families was recorded, including the endangered estuarine pipefish Syngnathus watermeyeri. Multivariate analyses (classification and ordination) of the catch assemblages revealed a high degree of similarity (> 70%) throughout the estuary, with two distinct groups being identified on the basis of substratum type. The sampling stations near the mouth with a sandy substratum were distinguished from all other sampling sites in the estuary. The dominant estuarine-spawning species were represented by all life-history stages, suggesting that they bred successfully in the estuary. This group was numerically and gravimetrically dominated by the two zooplanktivorous shoaling species Gilchristella aestuaria and Atherina breviceps with density extrapolated population size estimates of 420 973 and 198 275 individuals, and biomass estimates of 1.6 and 0.6 g m⁻² respectively. The total population size of all estuarine-spawning species with a mean biomass 00.4 g m⁻² was estimated at 754 217 individuals. Population size estimates of the marine-spawning species were calculated using data obtained from three independent mark-recapture experiments. The assumptions for the mark-recapture analyses were adequately met and it was concluded that the techniques provided reliable estimates of population size. However, estimates obtained from density extrapolation revealed enormous variability and were considered to be unreliable. The total population size was estimated at 63 342, 18 592 and 13 5 192 during the three mark-recapture experiments respectively. The numerically dominant species during all three experiments was Rhabdosargus holubi. Biomass production of the marine-spawning species was evaluated over a 123 day census period when population sizes and estimates of growth rates were known. Productivity for all fishes with a standing stock of 26.2 g m⁻² was calculated at 4.5 g m⁻² month01 Rhabdosargus holubi accounted for more than 75% of the total marine fish productivity. This study draws attention to the success of Rhabdosargus holubi in the East Kleinemonde estuary, which is ascribed to aspects of its biology. These include an extended breeding season, the ability to recruit into the estuary under adverse open mouth conditions and its omnivorous food habits. The dominance of this migratory species suggests that it plays an important role in the transfer of energy to the coastal marine environment when the mouth of the East Kleinemonde estuary opens. Predation by birds and a dominant piscivorous fish (Lichia amia) was quantitatively assessed over a period of two years. Monthly food consumption by all piscivorous birds revealed large temporal variability, ranging from 32 to 466 kg month-I An unusual invasion of Cape cormorants during the winter of 1994 accounted for large scale mortality (2246 kg of fish) over a relatively short period. The predatory impact of this episodic event was reflected in the findings of the fish mark-recapture experiments, which revealed a 70% reduction in the total population of marine-spawning fishes (above a certain minimum size) in the estuary subsequent to this invasion. Monthly food consumption by the Lichia amia population in the estuary was calculated at 68 and 58 kg month-I for two distinct time periods when the population size was known. These findings suggest that this species is the top piscivorous predator in the East Kleinemonde estuary. Finally, the findings of this study highlight the temporal variability of fish populations within a single estuary. It is suggested that predation and estuary mouth conditions are the main factors influencing the abundance (and its variability) of individual species in the East Kleinemonde estuary.
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  • Date Issued: 1999

Forms and techniques of modern painting

- Ning, Cui

  • Authors: Ning, Cui
  • Date: 1999
  • Subjects: Painting, Modern
  • Language: English
  • Type: Thesis , Masters , MFA
  • Identifier: vital:2418 , http://hdl.handle.net/10962/d1002214
  • Description: In this thesis, I have made an attempt to discuss and comment on oil painting from the "angle of concepts, forms, both traditional as well as more recent techniques of modern painting
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  • Date Issued: 1999

Fuck Q

- Tonton Mac, Sugar Flavor, Caporal F (lead vocals), Suzanne Khar Fofana Ass II, Bouba (chorus), El hadji Cissokho, Babouli Cissokho (kora), Laye Kane, Urbain Lambert (guitar), Jazzy M (scratch), Sama Flavor (composed by), Studio 2000

Glimpsing the balance between earth and sky: a meeting ground for postmodernism and Christianity in four selected novels by Jeanette Winterson and John Irving

- Edwards, Ross Stephen

  • Authors: Edwards, Ross Stephen
  • Date: 1999
  • Subjects: Postmodernism -- Religious aspects Winterson, Jeanette, 1959- Irving, John, 1942- Postmodernism (Literature)
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:2186 , http://hdl.handle.net/10962/d1002228
  • Description: The phrase “glimpsing the balance between earth and sky” in the thesis title is taken from Jeanette Winterson’s Oranges Are Not the Only Fruit. In this novel, the central character Jeanette believes she has glimpsed the possibility that human relationships can find their mirror in the relationship with God, as she understands the divine Other. This glimpse has set her wandering, trying to find such a balance. This examination of four selected novels by Jeanette Winterson and John Irving shows that for Irving, “glimpsing the balance” means in part, giving voice to a strongly “Christian” view of humankind and human nature but in an age where the prevailing intellectual worldview is strongly sceptical of any Grand Narrative. The “voice” expressed in Irving’s work has to be situated, like Winterson’s, as one among many possibilities. Irving’s voice is itself masked as different, other/Other, freakish, in the narrative worlds he creates. Through his use of grotesque comedy as a vehicle for deeper philosophical concerns, Irving asks us: What after all in the postmodern world is the main show? This thesis argues that if Winterson and Irving are testing or re-presenting a Christian worldview in a postmodern context, than they are asking whether Christianity is capable of assimilating and rising above the worst circumstances the world, writer, and life can throw at it. In Oranges Are Not the Only Fruit, Winterson tells a story of “forbidden love”, posed as a direct challenge to the prevailing way of knowing in her character’s community. In Gut Symmetries, she expands this challenge by employing the insights of quantum physics to make sense of the complexities raised by a triangular love relationship. Irving offers the story of Owen in A Prayer for Owen Meany as the kind of story which might possibly make a believer out of him; in short, that he would have to be a witness to some kind of miracle, something utterly inexplicable. In A Son of the Circus Irving narrates the quest for identity undertaken by an Indian doctor who is in every way a Displaced Person – the condition, he implies, of anyone who purports to find their piece of the truth. The theoretical concerns of the postmodern project are examined through Lawrence Cahoone’s argument that postmodern writing offers criticism of: presence, origin, unity and transcendence through an analytical strategy of constitutive otherness. In each of their texts, Irving and Winterson are seen to use these four critical elements and to offer a postmodern strategy of re-presenting meaning through “constitutive otherness”. Both writers also employ a strategy of historiographic metafiction (as defined by Linda Hutcheon) as a means of constructing and re-presenting their narrated stories. Postmodern paradox is compatible with what could be called a Christian plan for living, if the latter is in turn given an appropriate 1990s interpretation. The selected novels by Winterson and Irving are offered as contemporary evidence for this view. This thesis argues that the connection between postmodernism and other worldviews, particularly Christianity, is found in both projects’ process of making meanings through encounters with an other/Other.
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  • Date Issued: 1999

Gnewagne

- Amadou Sodia (lead singer, bolon, kora), Hadja Maningbe, Djanka Diabate, Awa Maiga, Valerie Belinga (chorus), Ansoumane Kante, Yeye (percussions), Adama Conde (balafon), Alpha Camara (congas), Ousmane Kouyate, Djely Moussa Kouyate,Manfila Kante (guitar), Djessou Mory (rythm guitar, solo), Brass: Christian Martinez (trumpet), Bernard Camoin (trombone), Thierry Farrugia (saxophone), Phillipe Guez (arrangement, keyboard), Patrick Mareck

Gor Sayina

- Ismael Lo (author, composer, lead vocal, rhythm guitar, harmonica, chorus), EH. Malick Diouf (solo guitar, arrangments), Paul Thierry Oliveira (keyboard, arrangments), Alioune Wade (bass guitar), El Hadji Faye (percussion), Figaro Diagne (marimba), Abib Ndiaye (drums), Thirifays Claude (saxophone), Ramirez Jean Pierre (trumpet), Welch Jean Marc (trombone), Ousemane Hamadi (performer), Studio 2000, Samassa Records

Graphicacy as a form of communication

- Wilmot, P Dianne

  • Authors: Wilmot, P Dianne
  • Date: 1999
  • Language: English
  • Type: Article
  • Identifier: vital:6091 , http://hdl.handle.net/10962/d1008613
  • Description: Children of today inhabit a multi-dimensional world and in order to communicate effectively in it they need the ability to utilise four forms of communication namely, oracy, literacy, numeracy and graphicacy. Communicating in graphic form requires an ability to both encode and decode spatial information using symbols which requires the utilisation and application of spatial perceptual skills and concepts. The draft Curriculum Framework for General and Further Education and Training identifies graphic literacy as one of the critical outcomes of the new South African curriculum. Spatial information about the environment is most frequently communicated in the graphic mode. Yet if graphicacy is to be recognised as an essential mode of communication and, as such, a vital element in education, then we need to seek ways of developing and introducing an explicit and critical pedagogy in our schools to foster the development of graphic and critical graphic literacy. But first, the skills and concepts integral to graphicacy need to be identified and understood. This article provides a framework for thinking about graphicacy as a form of communication in the General Education and Training (GET) band, the compulsory component of South African education (Grades 1-9).
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  • Date Issued: 1999

Guy Butler (obituary)

- Wright, Laurence

  • Authors: Wright, Laurence
  • Date: 1999
  • Language: English
  • Type: Article
  • Identifier: vital:7052 , http://hdl.handle.net/10962/d1007411
  • Description: An obituary focusing on Guy Butler's Shakespearean preoccupations. The 1999/2000 volume of Shakespeare in Southern Africa only appeared in 2001. The Butler obituary was included as a 'stop-press' item as the volume went to print, which accounts for the apparent anomaly between the date of publication and the date of Guy Butler's death.
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  • Date Issued: 1999

Hip hop

- Tonton Mac, Sugar Flavor, Caporal F (lead vocals), Suzanne Khar Fofana Ass II, Bouba (chorus), El hadji Cissokho, Babouli Cissokho (kora), Laye Kane, Urbain Lambert (guitar), Jazzy M (scratch), Sama Flavor (composed by), Studio 2000

Histoire Sans Fin

- Tonton Mac, Sugar Flavor, Caporal F (lead vocals), Suzanne Khar Fofana Ass II, Bouba (chorus), El hadji Cissokho, Babouli Cissokho (kora), Laye Kane, Urbain Lambert (guitar), Jazzy M (scratch), Sama Flavor (composed by), Studio 2000

Hommage (Faitai)

- Billy Sincop, Goly Herve (key board), Vata Monbassa, Santa N'guessan, N'dri Martial (guitars), Niamkey Jusitine, Botha Therese, Loukou Kedjebo, N'guessan Pitie, Gerbasco, Kouadio Maurison (chorus), Santa N'guessan (arrangement), Kouadio Maurison (perfromer), Santa N'guessan

Hotep Galeta intervew

- Hotep Galeta interviewee, Struan Douglas interviewer, International Library of African Music

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