Women leadership: a case study in the Otjozondjupa Region, Namibia
- Authors: Araes, Cornelia
- Date: 2012
- Subjects: Women -- Education (Primary) -- Namibia Leadership in women -- Education (Primary) -- Namibia Management -- Education (Primary) -- Namibia Educational leadership -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1825 , http://hdl.handle.net/10962/d1003711
- Description: Empowerment of women in leadership and in particular, school leadership has been the focus of the Namibian government and the country since independence in 1990. Different policies and laws, post‐independence, make provision for women empowerment and leadership in a range of organisations and institutions throughout the country. However, reports on gender equity in leadership positions suggest that Namibia is not really moving towards these policy goals at a sufficiently quick pace. A lot still needs to be achieved in terms of transforming the gender stereotyping in Namibia, which still suffers from the legacy of gender discrimination of the apartheid era. Modern‐day academic authors and journalists portray an increasing interest in an awareness of the advantages of women leadership. Women are increasingly perceived to have leadership styles more suitable for contemporary conditions than men. It is against this backdrop that this study sought to investigate women leadership in the Otjiwarongo circuit in the Otjozondjupa educational region in Namibia. The study used a qualitative, interpretive research paradigm. It adopted a case study approach. The primary participants consisted of four women principals in the Otjiwarongo circuit and the secondary participants included four women education officers from the same circuit. Semi‐structured interviews, a focus group interview and observation were applied as methods for collecting data and the data collection period was just over six weeks. Data analysis was done through coding and identification of categories. The findings revealed that women principals possessed the qualities of commitment, good communication and are passionate about their work, which are qualities normally associated with effective leadership. In terms of their role in their schools, they emerged as democratic leaders who involved all stakeholders in the decision making process through consensus. In addition, they demonstrated distributive and servant leadership in their interactions with stakeholders. The main challenge to the leadership position of these women principals seemed to be the stereotypical view held, that as women, they had to work twice as hard as men at leading schools. The study recommended that people oriented leadership styles, such as the ones enacted by the women principals in this study, are highly recommended for effective leadership in the 21st century.
- Full Text:
- Date Issued: 2012
- Authors: Araes, Cornelia
- Date: 2012
- Subjects: Women -- Education (Primary) -- Namibia Leadership in women -- Education (Primary) -- Namibia Management -- Education (Primary) -- Namibia Educational leadership -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1825 , http://hdl.handle.net/10962/d1003711
- Description: Empowerment of women in leadership and in particular, school leadership has been the focus of the Namibian government and the country since independence in 1990. Different policies and laws, post‐independence, make provision for women empowerment and leadership in a range of organisations and institutions throughout the country. However, reports on gender equity in leadership positions suggest that Namibia is not really moving towards these policy goals at a sufficiently quick pace. A lot still needs to be achieved in terms of transforming the gender stereotyping in Namibia, which still suffers from the legacy of gender discrimination of the apartheid era. Modern‐day academic authors and journalists portray an increasing interest in an awareness of the advantages of women leadership. Women are increasingly perceived to have leadership styles more suitable for contemporary conditions than men. It is against this backdrop that this study sought to investigate women leadership in the Otjiwarongo circuit in the Otjozondjupa educational region in Namibia. The study used a qualitative, interpretive research paradigm. It adopted a case study approach. The primary participants consisted of four women principals in the Otjiwarongo circuit and the secondary participants included four women education officers from the same circuit. Semi‐structured interviews, a focus group interview and observation were applied as methods for collecting data and the data collection period was just over six weeks. Data analysis was done through coding and identification of categories. The findings revealed that women principals possessed the qualities of commitment, good communication and are passionate about their work, which are qualities normally associated with effective leadership. In terms of their role in their schools, they emerged as democratic leaders who involved all stakeholders in the decision making process through consensus. In addition, they demonstrated distributive and servant leadership in their interactions with stakeholders. The main challenge to the leadership position of these women principals seemed to be the stereotypical view held, that as women, they had to work twice as hard as men at leading schools. The study recommended that people oriented leadership styles, such as the ones enacted by the women principals in this study, are highly recommended for effective leadership in the 21st century.
- Full Text:
- Date Issued: 2012
Katikiro
- Arajabu and Co, Composer not specified, Tracey, Hugh
- Authors: Arajabu and Co , Composer not specified , Tracey, Hugh
- Date: 1951-00-00
- Subjects: Popular music--Africa , Field recordings , Africa, Sub-Saharan , Africa country not specified City not specified f-
- Language: Luganda
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/257880 , vital:52910 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , CR3777 , CES351
- Description: Indigenous song
- Full Text: false
- Date Issued: 1951-00-00
- Authors: Arajabu and Co , Composer not specified , Tracey, Hugh
- Date: 1951-00-00
- Subjects: Popular music--Africa , Field recordings , Africa, Sub-Saharan , Africa country not specified City not specified f-
- Language: Luganda
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/257880 , vital:52910 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , CR3777 , CES351
- Description: Indigenous song
- Full Text: false
- Date Issued: 1951-00-00
Atuyanye
- Arajabu and Co, Composer not specified, Tracey, Hugh
- Authors: Arajabu and Co , Composer not specified , Tracey, Hugh
- Date: 1951-00-00
- Subjects: Popular music--Africa , Field recordings , Africa, Sub-Saharan , Africa country not specified City not specified f-
- Language: Luganda
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/257889 , vital:52911 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , CR3777 , CES352
- Description: Indigenous song
- Full Text: false
- Date Issued: 1951-00-00
- Authors: Arajabu and Co , Composer not specified , Tracey, Hugh
- Date: 1951-00-00
- Subjects: Popular music--Africa , Field recordings , Africa, Sub-Saharan , Africa country not specified City not specified f-
- Language: Luganda
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/257889 , vital:52911 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , CR3777 , CES352
- Description: Indigenous song
- Full Text: false
- Date Issued: 1951-00-00
Arap Momoen (I
- Arap Ng' asuru, Kipsigis men, Folk, Tracey, Hugh
- Authors: Arap Ng' asuru , Kipsigis men , Folk , Tracey, Hugh
- Date: 1950
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Kenya City not specified f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/299889 , vital:57865 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP2089-XYZ5524a
- Description: Indigenous music
- Full Text: false
- Date Issued: 1950
- Authors: Arap Ng' asuru , Kipsigis men , Folk , Tracey, Hugh
- Date: 1950
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Kenya City not specified f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/299889 , vital:57865 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP2089-XYZ5524a
- Description: Indigenous music
- Full Text: false
- Date Issued: 1950
Arap Momoen (II
- Arap Ng' asuru, Kipsigis men, Folk, Tracey, Hugh
- Authors: Arap Ng' asuru , Kipsigis men , Folk , Tracey, Hugh
- Date: 1950
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Kenya City not specified f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/299939 , vital:57873 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP2089-XYZ5524b
- Description: Indigenous music
- Full Text: false
- Date Issued: 1950
- Authors: Arap Ng' asuru , Kipsigis men , Folk , Tracey, Hugh
- Date: 1950
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Kenya City not specified f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/299939 , vital:57873 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP2089-XYZ5524b
- Description: Indigenous music
- Full Text: false
- Date Issued: 1950
Arap Momoen 1
- Arap Ng'asura, Kipsigis men, Composer not specified, Tracey, Hugh
- Authors: Arap Ng'asura , Kipsigis men , Composer not specified , Tracey, Hugh
- Date: 1950
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Kenya city not specified f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/395857 , vital:69127 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , AC0926-D6L13a
- Description: Indigenous music
- Full Text: false
- Date Issued: 1950
- Authors: Arap Ng'asura , Kipsigis men , Composer not specified , Tracey, Hugh
- Date: 1950
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Kenya city not specified f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/395857 , vital:69127 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , AC0926-D6L13a
- Description: Indigenous music
- Full Text: false
- Date Issued: 1950
Arap Momoen 2
- Arap Ng'asura, Kipsigis men, Composer not specified, Tracey, Hugh
- Authors: Arap Ng'asura , Kipsigis men , Composer not specified , Tracey, Hugh
- Date: 1950
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Kenya city not specified f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/395862 , vital:69128 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , AC0926-D6L13b
- Description: Indigenous music
- Full Text: false
- Date Issued: 1950
- Authors: Arap Ng'asura , Kipsigis men , Composer not specified , Tracey, Hugh
- Date: 1950
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Kenya city not specified f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/395862 , vital:69128 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , AC0926-D6L13b
- Description: Indigenous music
- Full Text: false
- Date Issued: 1950
Arap Momoen II
- Authors: Arap Ng'asuru , Hugh Tracey
- Date: 1950
- Subjects: Kipsigis (African people) , Folk music--Kenya , Folk music , Field recordings , Africa, Sub-Saharan , Africa Kenya Kapkatet f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/177619 , vital:42839 , International Library of African Music, Rhodes University, Grahamstown, South Africa , TR165-09
- Description: Drinking song under the same title expressing thnks to their host for the party and wising 'farewell' as they leave. Drinking song.
- Full Text: false
- Date Issued: 1950
- Authors: Arap Ng'asuru , Hugh Tracey
- Date: 1950
- Subjects: Kipsigis (African people) , Folk music--Kenya , Folk music , Field recordings , Africa, Sub-Saharan , Africa Kenya Kapkatet f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/177619 , vital:42839 , International Library of African Music, Rhodes University, Grahamstown, South Africa , TR165-09
- Description: Drinking song under the same title expressing thnks to their host for the party and wising 'farewell' as they leave. Drinking song.
- Full Text: false
- Date Issued: 1950
Arap Momoen I
- Authors: Arap Ng'asuru , Hugh Tracey
- Date: 1950
- Subjects: Kipsigis (African people) , Folk music--Kenya , Folk music , Field recordings , Africa, Sub-Saharan , Africa Kenya Kapkatet f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/177611 , vital:42838 , International Library of African Music, Rhodes University, Grahamstown, South Africa , TR165-08
- Description: Drinking song under the same title expressing thnks to their host for the party and wising 'farewell' as they leave. Drinking song.
- Full Text: false
- Date Issued: 1950
- Authors: Arap Ng'asuru , Hugh Tracey
- Date: 1950
- Subjects: Kipsigis (African people) , Folk music--Kenya , Folk music , Field recordings , Africa, Sub-Saharan , Africa Kenya Kapkatet f-ke
- Language: Kipsigis
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/177611 , vital:42838 , International Library of African Music, Rhodes University, Grahamstown, South Africa , TR165-08
- Description: Drinking song under the same title expressing thnks to their host for the party and wising 'farewell' as they leave. Drinking song.
- Full Text: false
- Date Issued: 1950
Unearthed : personifications of widowhood and acts of memory : volume 1 and 2
- Authors: Arbi, Linda Margaret
- Date: 2009
- Subjects: Widowhood -- Social aspects -- South Africa Widowhood -- Social aspects -- Cape of Good Hope (South Africa) Widows in art -- South Africa Widows in art -- Cape of Good Hope (South Africa) Memory in art -- South Africa Memory in art -- Cape of Good Hope (South Africa)
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2428 , http://hdl.handle.net/10962/d1002225
- Description: By researching visual traditions of representing widows in relation to a social role, I explore how these may be related to processes of mourning and memory. My study begins with an historical reading and, along with an analysis of Renaissance widow portraiture, I trace the experiences of widows in the Cape of Good Hope. For the purposes of this thesis, I have selected images of widows to investigate memory-work particularly when speaking of loss. I re-view these memory processes through recent historical and art historical discourse with reference to contemporary South African artworks in order to understand how public memory is formed by way of visual documentation. These narratives around widowhood have informed the subject matter for my Master’s exhibition and shed light on my own experience as a widow. The interaction between objects and memory are of particular interest and manifest in my studio art practice.
- Full Text:
- Date Issued: 2009
- Authors: Arbi, Linda Margaret
- Date: 2009
- Subjects: Widowhood -- Social aspects -- South Africa Widowhood -- Social aspects -- Cape of Good Hope (South Africa) Widows in art -- South Africa Widows in art -- Cape of Good Hope (South Africa) Memory in art -- South Africa Memory in art -- Cape of Good Hope (South Africa)
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2428 , http://hdl.handle.net/10962/d1002225
- Description: By researching visual traditions of representing widows in relation to a social role, I explore how these may be related to processes of mourning and memory. My study begins with an historical reading and, along with an analysis of Renaissance widow portraiture, I trace the experiences of widows in the Cape of Good Hope. For the purposes of this thesis, I have selected images of widows to investigate memory-work particularly when speaking of loss. I re-view these memory processes through recent historical and art historical discourse with reference to contemporary South African artworks in order to understand how public memory is formed by way of visual documentation. These narratives around widowhood have informed the subject matter for my Master’s exhibition and shed light on my own experience as a widow. The interaction between objects and memory are of particular interest and manifest in my studio art practice.
- Full Text:
- Date Issued: 2009
Archontic Aporias: the mediums of memory
- Authors: Arbuckle, Julia Ruth
- Date: 2023-03-30
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/408727 , vital:70520
- Description: Contextualising my research within the Eastern Cape as a descendant of 1820 settlers, I question the modalities of historical recollection by introducing memory as a viable mode of archival production alongside that of the archive. Through interrogating Eastern Cape archival institutes and employing an autoethnographic approach to my familial archives, I show that archival curation affects the gaps, schisms, and interpretations of archives as much as the ‘unreliability’ of memory. I rely on definitions from Jacques Derrida and literature from Achille Mbembe and Verne Harris, as well as reflexive methodologies, to engage the ways of remembering the past and methods of storytelling. With this undertaking, I expose the aporias within archival processes. This written component is part of broader research that encompasses theoretical study and a practice-based Fine Arts research project culminating in an exhibition that shares themes of memory, archive, trauma, and curatorial and personal heritage management. This research engages in case studies of artworks by Angela Deane and Maureen de Jager to contextualise and position the creative process. , Thesis (MFA) -- Faculty of Humanities, Fine Art, 2023
- Full Text:
- Date Issued: 2023-03-30
- Authors: Arbuckle, Julia Ruth
- Date: 2023-03-30
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/408727 , vital:70520
- Description: Contextualising my research within the Eastern Cape as a descendant of 1820 settlers, I question the modalities of historical recollection by introducing memory as a viable mode of archival production alongside that of the archive. Through interrogating Eastern Cape archival institutes and employing an autoethnographic approach to my familial archives, I show that archival curation affects the gaps, schisms, and interpretations of archives as much as the ‘unreliability’ of memory. I rely on definitions from Jacques Derrida and literature from Achille Mbembe and Verne Harris, as well as reflexive methodologies, to engage the ways of remembering the past and methods of storytelling. With this undertaking, I expose the aporias within archival processes. This written component is part of broader research that encompasses theoretical study and a practice-based Fine Arts research project culminating in an exhibition that shares themes of memory, archive, trauma, and curatorial and personal heritage management. This research engages in case studies of artworks by Angela Deane and Maureen de Jager to contextualise and position the creative process. , Thesis (MFA) -- Faculty of Humanities, Fine Art, 2023
- Full Text:
- Date Issued: 2023-03-30
A review of the geology of primary tin deposits with emphasis on the factors that control grade and tonnage
- Authors: Archer, Paul D
- Date: 1981
- Subjects: Tin ores , Granite , Geology , Tonnage
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4912 , http://hdl.handle.net/10962/d1001572
- Description: "The purpose of this dissertation is ... to review the economic geology of primary tin deposits and the geological factors that control grade and tonnage . The work concludes with a discussian of the implications of these geological controls on evaluation"-- Introd., p. 1
- Full Text:
- Date Issued: 1981
- Authors: Archer, Paul D
- Date: 1981
- Subjects: Tin ores , Granite , Geology , Tonnage
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4912 , http://hdl.handle.net/10962/d1001572
- Description: "The purpose of this dissertation is ... to review the economic geology of primary tin deposits and the geological factors that control grade and tonnage . The work concludes with a discussian of the implications of these geological controls on evaluation"-- Introd., p. 1
- Full Text:
- Date Issued: 1981
An anatomical investigation of jointed cactus (Opuntia aurantiaca, Lindley) with germination tests, and observations on the movements of the stomata
- Authors: Archibald, E E A
- Date: 1936
- Subjects: Cactus -- Anatomy , Opuntia , Stomata , Germination
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4264 , http://hdl.handle.net/10962/d1013444
- Description: From Introduction: In 1934 the Government started an active campaign on the eradiction of Jointed Cactus. This plant was causing considerable damage to the farms and commonages of the Eastern Province, and was spreading at an alarming rate. The Officer in Charge of eradication, Mr E. du Toit, was stationed at Grahamstown which is fairly centrally situated in the infested area. In 1935 Dr A. Leemann of the Division of Plant Industry made his headquarters at Rhodes University College.
- Full Text:
- Date Issued: 1936
- Authors: Archibald, E E A
- Date: 1936
- Subjects: Cactus -- Anatomy , Opuntia , Stomata , Germination
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4264 , http://hdl.handle.net/10962/d1013444
- Description: From Introduction: In 1934 the Government started an active campaign on the eradiction of Jointed Cactus. This plant was causing considerable damage to the farms and commonages of the Eastern Province, and was spreading at an alarming rate. The Officer in Charge of eradication, Mr E. du Toit, was stationed at Grahamstown which is fairly centrally situated in the infested area. In 1935 Dr A. Leemann of the Division of Plant Industry made his headquarters at Rhodes University College.
- Full Text:
- Date Issued: 1936
An investigation into the taxonomy of the diatoms (Bacillariophyta) of the Sundays and Great Fish Rivers, with ecological observations on the Sundays River
- Archibald, Robert Eldred Mostert
- Authors: Archibald, Robert Eldred Mostert
- Date: 1982
- Subjects: Diatoms -- South Africa -- Eastern Cape Diatoms -- Classification Aquatic ecology -- South Africa -- Eastern Cape -- Sundays River
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4180 , http://hdl.handle.net/10962/d1003728
- Description: This report on the diatoms (Bacillariophyta) of the Sundays and Great Fish rivers is divided into two sections. In Volume 1 the taxonomy of the diatoms from these two river systems is examined. A total of 331 taxa were studied, of which 5 are described as new species. Two taxa are given new names, since they were previously known under later homonyms. Twenty seven taxa were recorded for the first time from South Africa, while a number of species are given amended descriptions in the light of fresh information obtained concerning them. A few taxa (chiefly South African forms) have been united with previously described taxa. For the remainder of the taxa mentioned in the text, comments are passed with regard to their taxonomy and dimensions, based on facts gained through literature surveys and personal observations of the relevant taxa. As far as possible all taxa examined in Volume 1 are illustrated, and these illustrations are presented in Volume 3 of this study. Volume 2 deals with the ecology of the diatoms in the Sundays River. Special emphasis is laid on relating the composition of the diatom associations at the selected stations to the ambient salinity and ionic composition of the water. A new index, the Salinity Tolerance Index (STI), is proposed to summarize by means of a numerical value the information obtained from the analysis of a diatom association with respect to the character of the component taxa, and to indicate whether the association is derived from a freshwater, brackish water or marine source. The efficacy of the STI is evaluated in the text. The effect of the geological formations of the Sundays River valley and the underground waters emanating from them is discussed in the text. The consequences of a severe drought in the lower Sundays River, including hypersaline water in the upper estuary, on the diatom flora are also investigated.
- Full Text:
- Date Issued: 1982
- Authors: Archibald, Robert Eldred Mostert
- Date: 1982
- Subjects: Diatoms -- South Africa -- Eastern Cape Diatoms -- Classification Aquatic ecology -- South Africa -- Eastern Cape -- Sundays River
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4180 , http://hdl.handle.net/10962/d1003728
- Description: This report on the diatoms (Bacillariophyta) of the Sundays and Great Fish rivers is divided into two sections. In Volume 1 the taxonomy of the diatoms from these two river systems is examined. A total of 331 taxa were studied, of which 5 are described as new species. Two taxa are given new names, since they were previously known under later homonyms. Twenty seven taxa were recorded for the first time from South Africa, while a number of species are given amended descriptions in the light of fresh information obtained concerning them. A few taxa (chiefly South African forms) have been united with previously described taxa. For the remainder of the taxa mentioned in the text, comments are passed with regard to their taxonomy and dimensions, based on facts gained through literature surveys and personal observations of the relevant taxa. As far as possible all taxa examined in Volume 1 are illustrated, and these illustrations are presented in Volume 3 of this study. Volume 2 deals with the ecology of the diatoms in the Sundays River. Special emphasis is laid on relating the composition of the diatom associations at the selected stations to the ambient salinity and ionic composition of the water. A new index, the Salinity Tolerance Index (STI), is proposed to summarize by means of a numerical value the information obtained from the analysis of a diatom association with respect to the character of the component taxa, and to indicate whether the association is derived from a freshwater, brackish water or marine source. The efficacy of the STI is evaluated in the text. The effect of the geological formations of the Sundays River valley and the underground waters emanating from them is discussed in the text. The consequences of a severe drought in the lower Sundays River, including hypersaline water in the upper estuary, on the diatom flora are also investigated.
- Full Text:
- Date Issued: 1982
Studies on the ecology and systematics of the diatoms (Bacillariophyta) from some South Africa rivers
- Archibald, Robert Eldred Mostert
- Authors: Archibald, Robert Eldred Mostert
- Date: 1969
- Subjects: Diatoms -- Ecology -- South Africa , Diatoms -- Classification , Aquatic ecology -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4098 , http://hdl.handle.net/10962/d1009494 , Diatoms -- Ecology -- South Africa , Diatoms -- Classification , Aquatic ecology -- South Africa
- Description: This report contains the results of some ecological and systematic studies on the diatoms from the Vaal Dam catchment area in the Transvaal, and the Bloukrans River in the Eastern Cape Province. In Part 1 the effects of high concentrations of nitrogen were studied in relation to the composition of the diatom associations. Water samples from four stations on the Bloukrans River were analysed chemically at certain intervals during the months of April and August 1967. Diatom samples collected from these stations at the beginning and end of each of these sampling periods were subjected to a "Thomasson Analysis" to determine the relative densities of the various species in the diatom associations. A statistical analysis of the results reflected a poor but positive correlation between the two variables, i.e. high numbers of nitrogen heterotrophic Nitzschiae were correlated with high concentrations of nitrogen, while low numbers were correlated with low concentrations. Part 2 presents the results of the ecological studies on the diatom associations of the Vaal Dam Catchment Area. In this section the diatom associations from each sampling point or station were subjected to a "Thomasson Analysis" to determine the relative densities of the different species in the associations. Employing already known correlations between environment and association, the results of this analysis were discussed and the ecological conditions for each sampling station were assessed. The associations were similar in composition over the entire catchment area, and indicated on the whole water of good quality. Points of pollution were detected, but were generally localised and the effects of the pollution were soon removed. Only the Waterval River showed evidence of more constant pollution. The associations provided evidence for some seasonal variation in their composition. Finally in Part 3 the systematics and taxonomy of the diatoms in the Vaal Dam catchment area are discussed. References are made to the original and more recent descriptions of each species found in this study, and a list of synonyms is given wherever 'possible. Comments on the systematics, taxonomy and autecology of each species are given, and the distribution of the species in South Africa and the Vaal Dam catchment area is discussed. A number of species, varieties and forms have been recorded for the first time in South Africa. During the course of this study 20 species have been described as new to science; the descriptions of some have been published, while the descriptions of the others will be published formally in the future. All species described as new or having interesting features are illustrated in the plates.
- Full Text:
- Date Issued: 1969
- Authors: Archibald, Robert Eldred Mostert
- Date: 1969
- Subjects: Diatoms -- Ecology -- South Africa , Diatoms -- Classification , Aquatic ecology -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4098 , http://hdl.handle.net/10962/d1009494 , Diatoms -- Ecology -- South Africa , Diatoms -- Classification , Aquatic ecology -- South Africa
- Description: This report contains the results of some ecological and systematic studies on the diatoms from the Vaal Dam catchment area in the Transvaal, and the Bloukrans River in the Eastern Cape Province. In Part 1 the effects of high concentrations of nitrogen were studied in relation to the composition of the diatom associations. Water samples from four stations on the Bloukrans River were analysed chemically at certain intervals during the months of April and August 1967. Diatom samples collected from these stations at the beginning and end of each of these sampling periods were subjected to a "Thomasson Analysis" to determine the relative densities of the various species in the diatom associations. A statistical analysis of the results reflected a poor but positive correlation between the two variables, i.e. high numbers of nitrogen heterotrophic Nitzschiae were correlated with high concentrations of nitrogen, while low numbers were correlated with low concentrations. Part 2 presents the results of the ecological studies on the diatom associations of the Vaal Dam Catchment Area. In this section the diatom associations from each sampling point or station were subjected to a "Thomasson Analysis" to determine the relative densities of the different species in the associations. Employing already known correlations between environment and association, the results of this analysis were discussed and the ecological conditions for each sampling station were assessed. The associations were similar in composition over the entire catchment area, and indicated on the whole water of good quality. Points of pollution were detected, but were generally localised and the effects of the pollution were soon removed. Only the Waterval River showed evidence of more constant pollution. The associations provided evidence for some seasonal variation in their composition. Finally in Part 3 the systematics and taxonomy of the diatoms in the Vaal Dam catchment area are discussed. References are made to the original and more recent descriptions of each species found in this study, and a list of synonyms is given wherever 'possible. Comments on the systematics, taxonomy and autecology of each species are given, and the distribution of the species in South Africa and the Vaal Dam catchment area is discussed. A number of species, varieties and forms have been recorded for the first time in South Africa. During the course of this study 20 species have been described as new to science; the descriptions of some have been published, while the descriptions of the others will be published formally in the future. All species described as new or having interesting features are illustrated in the plates.
- Full Text:
- Date Issued: 1969
Biological and geophysical feedbacks with fire in the Earth System
- Archibald, S, Lehmann, C E, Belcher, C, Bond, W J, Bradstock, R A, Daniau, A L, Dexter, K, Forrestel, E J, Greve, M, He, T, Higgins, Simon I, Ripley, Bradford S
- Authors: Archibald, S , Lehmann, C E , Belcher, C , Bond, W J , Bradstock, R A , Daniau, A L , Dexter, K , Forrestel, E J , Greve, M , He, T , Higgins, Simon I , Ripley, Bradford S
- Date: 2017
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/61413 , vital:28024 , http://iopscience.iop.org/article/10.1088/1748-9326/aa9ead/meta
- Description: Roughly 3% of the Earth’s land surface burns annually, representing a critical exchange of energy and matter between the land and atmosphere via combustion. Fires range from slow smouldering peat fires, to low-intensity surface fires, to intense crown fires, depending on vegetation structure, fuel moisture, prevailing climate, and weather conditions. While the links between biogeochemistry, climate and fire are widely studied within Earth system science, these relationships are also mediated by fuels – namely plants and their litter – which are the product of evolutionary and ecological processes. Fire is a powerful selective force and, over their evolutionary history, plants across diverse clades have evolved numerous traits that either tolerate or promote fire. Here we outline a conceptual framework of how plant traits determine the flammability of ecosystems and interact with climate and weather to influence fire regimes. We explore how these evolutionary and ecological processes scale to impact biogeochemistry and Earth system processes. Finally, we outline several research challenges that, when resolved, will improve our understanding of the role of plant evolution in mediating the fire feedbacks driving Earth system processes. Understanding current patterns of fire and vegetation, as well as patterns of fire over geological time, requires research that incorporates evolutionary biology, ecology, biogeography, and the biogeosciences.
- Full Text:
- Date Issued: 2017
- Authors: Archibald, S , Lehmann, C E , Belcher, C , Bond, W J , Bradstock, R A , Daniau, A L , Dexter, K , Forrestel, E J , Greve, M , He, T , Higgins, Simon I , Ripley, Bradford S
- Date: 2017
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/61413 , vital:28024 , http://iopscience.iop.org/article/10.1088/1748-9326/aa9ead/meta
- Description: Roughly 3% of the Earth’s land surface burns annually, representing a critical exchange of energy and matter between the land and atmosphere via combustion. Fires range from slow smouldering peat fires, to low-intensity surface fires, to intense crown fires, depending on vegetation structure, fuel moisture, prevailing climate, and weather conditions. While the links between biogeochemistry, climate and fire are widely studied within Earth system science, these relationships are also mediated by fuels – namely plants and their litter – which are the product of evolutionary and ecological processes. Fire is a powerful selective force and, over their evolutionary history, plants across diverse clades have evolved numerous traits that either tolerate or promote fire. Here we outline a conceptual framework of how plant traits determine the flammability of ecosystems and interact with climate and weather to influence fire regimes. We explore how these evolutionary and ecological processes scale to impact biogeochemistry and Earth system processes. Finally, we outline several research challenges that, when resolved, will improve our understanding of the role of plant evolution in mediating the fire feedbacks driving Earth system processes. Understanding current patterns of fire and vegetation, as well as patterns of fire over geological time, requires research that incorporates evolutionary biology, ecology, biogeography, and the biogeosciences.
- Full Text:
- Date Issued: 2017
Letter from HM Arderne to Walter Jardine, 1864
- Arderne, Henry Mathew, Jardine, Walter
- Authors: Arderne, Henry Mathew , Jardine, Walter
- Date: 1864-09-03 , 2021-09-29
- Subjects: Jardine, Walter , Botanical Gardens -- South Africa , Arderne Gardens -- South Africa
- Type: text , letter
- Identifier: http://hdl.handle.net/10962/197546 , vital:45885 , Cory Library for Humanities Research, Rhodes University
- Description: Jardine Correspondence transcribed by Jean Kelly August 2021. Transcription: Claremont, Sept 3 1864. My dear Sir You mentioned to me when I was at the Vineyard the other day that you had a double white Fuchsia. If you can possibly spare a bud for striking or strike one for me I should be so obliged & if you have any others to spare I should be happy to purchase or exchange for varieties which you may not have. I have the following which I do not think you have as they were imported by [?]Kotzee last year. Queen of Hanover. Her Majesty The Bell The Universal England’s Glory. Yours truly HW Arderne. Note in margin: Any other good plants I am always open to purchase. Dahlia roots, Roses, etc.
- Full Text: false
- Authors: Arderne, Henry Mathew , Jardine, Walter
- Date: 1864-09-03 , 2021-09-29
- Subjects: Jardine, Walter , Botanical Gardens -- South Africa , Arderne Gardens -- South Africa
- Type: text , letter
- Identifier: http://hdl.handle.net/10962/197546 , vital:45885 , Cory Library for Humanities Research, Rhodes University
- Description: Jardine Correspondence transcribed by Jean Kelly August 2021. Transcription: Claremont, Sept 3 1864. My dear Sir You mentioned to me when I was at the Vineyard the other day that you had a double white Fuchsia. If you can possibly spare a bud for striking or strike one for me I should be so obliged & if you have any others to spare I should be happy to purchase or exchange for varieties which you may not have. I have the following which I do not think you have as they were imported by [?]Kotzee last year. Queen of Hanover. Her Majesty The Bell The Universal England’s Glory. Yours truly HW Arderne. Note in margin: Any other good plants I am always open to purchase. Dahlia roots, Roses, etc.
- Full Text: false
antioxidants-08-00309 (1) Aremu et al 2019.pdf
- Aremu OO, Oyedeji AO, Nkeh-Chungag BN, Rusike CRS
- Authors: Aremu OO , Oyedeji AO , Nkeh-Chungag BN , Rusike CRS
- Identifier: http://hdl.handle.net/11260/1512 , vital:37766
- Full Text:
- Authors: Aremu OO , Oyedeji AO , Nkeh-Chungag BN , Rusike CRS
- Identifier: http://hdl.handle.net/11260/1512 , vital:37766
- Full Text:
The Anti-hypertensive Properties of T. officinale on L-Name-induced Hypertensive Rats
- Aremu, Olukayode Olasunkanmi
- Authors: Aremu, Olukayode Olasunkanmi
- Date: 2016
- Subjects: Hypertension Anti-hypertensive
- Language: English
- Type: Thesis , Masters , M Sc
- Identifier: http://hdl.handle.net/11260/1045 , vital:30434
- Description: Medicinal plants have long been used in folkloric medicine in various parts of the world. Presence of phenolic compounds has been attributed to their medicinal properties. Despite various medicinal uses, scientific claims of anti-hypertensive activities are still deficient. Therefore, hydroethanolic (70% ethanol) extracts of the leaf and root parts of T. officinale (TOL and TOR respectively) were investigated for anti-hypertensive antioxidant, diuretic activities, and effects on lipid profile in L-Name-induced hypertensive Wistar rats. Phytochemical screening of TOL and TOR was assessed by known standardized method. Acute toxicity profile of the plant was also evaluated by Lorke’s method. Total phenolic and flavonoid contents were assessed using Folin Ciocalteau and Aluminium chloride colorimetric methods; while, 2, 2-diphenyl-1-picrylhydrazyl (DPPH), 2, 2’–azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS)and ferric antioxidant reducing power (FRAP) protocols were used for their radical scavenging and total antioxidant capacities respectively. Spontaneously hypertensive rats were used for acute antihypertensive study while for the 21 days antihypertensive study, hypertension was induced by administering L-Name (40 mg/kg) for 4 weeks and, CODA 8 Non-invasive tail cuff machine was used to measure blood pressure. With the aid of a semi-auto chemistry analyzer, lipid profile of Taraxacum officinale (TO) was determined using Biosinol reagents. TOL and TOR also significantly reduced systolic, diastolic and mean arterial blood pressures up until 4 hours with the leaf part most active in single dose study using SHR model. TOL and TOR also significantly lowered systolic, diastolic and mean arterial blood pressures with the leaf part most active in 21 days study using and L-Name-induced HTN models. However, these plant extracts did not have a diuretic effect, but seems to exert its antihypertensive effects by modulating NO production and possibly bioavailability, by acting via an endothelium-dependent pathway. This study validates the traditional use of the leaf part of the plant as an antihypertensive agent.
- Full Text:
- Date Issued: 2016
- Authors: Aremu, Olukayode Olasunkanmi
- Date: 2016
- Subjects: Hypertension Anti-hypertensive
- Language: English
- Type: Thesis , Masters , M Sc
- Identifier: http://hdl.handle.net/11260/1045 , vital:30434
- Description: Medicinal plants have long been used in folkloric medicine in various parts of the world. Presence of phenolic compounds has been attributed to their medicinal properties. Despite various medicinal uses, scientific claims of anti-hypertensive activities are still deficient. Therefore, hydroethanolic (70% ethanol) extracts of the leaf and root parts of T. officinale (TOL and TOR respectively) were investigated for anti-hypertensive antioxidant, diuretic activities, and effects on lipid profile in L-Name-induced hypertensive Wistar rats. Phytochemical screening of TOL and TOR was assessed by known standardized method. Acute toxicity profile of the plant was also evaluated by Lorke’s method. Total phenolic and flavonoid contents were assessed using Folin Ciocalteau and Aluminium chloride colorimetric methods; while, 2, 2-diphenyl-1-picrylhydrazyl (DPPH), 2, 2’–azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS)and ferric antioxidant reducing power (FRAP) protocols were used for their radical scavenging and total antioxidant capacities respectively. Spontaneously hypertensive rats were used for acute antihypertensive study while for the 21 days antihypertensive study, hypertension was induced by administering L-Name (40 mg/kg) for 4 weeks and, CODA 8 Non-invasive tail cuff machine was used to measure blood pressure. With the aid of a semi-auto chemistry analyzer, lipid profile of Taraxacum officinale (TO) was determined using Biosinol reagents. TOL and TOR also significantly reduced systolic, diastolic and mean arterial blood pressures up until 4 hours with the leaf part most active in single dose study using SHR model. TOL and TOR also significantly lowered systolic, diastolic and mean arterial blood pressures with the leaf part most active in 21 days study using and L-Name-induced HTN models. However, these plant extracts did not have a diuretic effect, but seems to exert its antihypertensive effects by modulating NO production and possibly bioavailability, by acting via an endothelium-dependent pathway. This study validates the traditional use of the leaf part of the plant as an antihypertensive agent.
- Full Text:
- Date Issued: 2016
An assessment of the effectiveness of public consultation: the case study of selected ward committees in the Northern Bay Municipality
- Authors: Arends, Darrin
- Date: 2011
- Subjects: Municipal government -- South Africa -- Eastern Cape -- Citizen participation , Local government -- South Africa -- Eastern Cape -- Citizen participation , Political planning -- South Africa -- Eastern Cape -- Citizen participation , Communities -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:8187 , http://hdl.handle.net/10948/1535 , Municipal government -- South Africa -- Eastern Cape -- Citizen participation , Local government -- South Africa -- Eastern Cape -- Citizen participation , Political planning -- South Africa -- Eastern Cape -- Citizen participation , Communities -- South Africa -- Eastern Cape
- Description: Since 1994, the South African local government has been obligated to consult with its citizenry in respect of the processes of relating to service delivery. The South African Government has developed a wide range of legislation that ensures that communities are consulted on a continuous basis with regard to how services need to be rendered. Communities have a right to be consulted and to give input into issues affecting them. Public consultation as envisaged in the South African legislation has, however, not yielded the desired results which is evident in the spate of service delivery protests over poor or non service delivery. Therefore, this study seeks to analyse the effectiveness and efficiency of pubic consultation in the Northern Areas of the Nelson Mandela Bay Municipality. The researcher used qualitative research methods since it would provide the reader with more insight into how public consultation is implemented in the Nelson Mandela Bay Municipality. The communities, senior municipal officials, and councillors have been interviewed in a structured manner and a content analysis has been made of the minutes of the ward committees in the Northern Areas, the annual reports of the Municipality’s Oversight Committee and a range of other reading material. A number of findings has been made during this research project with the most pertinent being the non-compliance to certain sections of legislation by the Municipality. The communities in the Northern Areas generally felt that efficient and effective public consultation would reduce the number of service delivery protests in that part of the Municipality. A number of interventions need to be made by the political leadership with regard to public consultation and more resources need to be committed towards those processes.
- Full Text:
- Date Issued: 2011
- Authors: Arends, Darrin
- Date: 2011
- Subjects: Municipal government -- South Africa -- Eastern Cape -- Citizen participation , Local government -- South Africa -- Eastern Cape -- Citizen participation , Political planning -- South Africa -- Eastern Cape -- Citizen participation , Communities -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:8187 , http://hdl.handle.net/10948/1535 , Municipal government -- South Africa -- Eastern Cape -- Citizen participation , Local government -- South Africa -- Eastern Cape -- Citizen participation , Political planning -- South Africa -- Eastern Cape -- Citizen participation , Communities -- South Africa -- Eastern Cape
- Description: Since 1994, the South African local government has been obligated to consult with its citizenry in respect of the processes of relating to service delivery. The South African Government has developed a wide range of legislation that ensures that communities are consulted on a continuous basis with regard to how services need to be rendered. Communities have a right to be consulted and to give input into issues affecting them. Public consultation as envisaged in the South African legislation has, however, not yielded the desired results which is evident in the spate of service delivery protests over poor or non service delivery. Therefore, this study seeks to analyse the effectiveness and efficiency of pubic consultation in the Northern Areas of the Nelson Mandela Bay Municipality. The researcher used qualitative research methods since it would provide the reader with more insight into how public consultation is implemented in the Nelson Mandela Bay Municipality. The communities, senior municipal officials, and councillors have been interviewed in a structured manner and a content analysis has been made of the minutes of the ward committees in the Northern Areas, the annual reports of the Municipality’s Oversight Committee and a range of other reading material. A number of findings has been made during this research project with the most pertinent being the non-compliance to certain sections of legislation by the Municipality. The communities in the Northern Areas generally felt that efficient and effective public consultation would reduce the number of service delivery protests in that part of the Municipality. A number of interventions need to be made by the political leadership with regard to public consultation and more resources need to be committed towards those processes.
- Full Text:
- Date Issued: 2011