Determination and validation of medicinal plants used by farmers to control internal and external parasites in goats in the Eastern Cape Province, South Africa
- Authors: Sanhokwe, Marcia
- Date: 2015
- Subjects: Medicinal plants -- South Africa -- Eastern Cape Goats -- Parasites -- Control
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2249 , vital:27718
- Description: The broad objective of the study was to determine and validate medicinal plants used by resource-limited farmers to control internal and external parasites in goats in the Eastern Cape Province, South Africa. A survey was conducted among 50 farmers and three herbalists to determine medicinal plants used to control parasites in goats. The survey revealed nine plant species belonging to eight families that were used. Among the identified plant species, Aloe ferox, Acokanthera oppositifolia and Elephantorrhiza elephantina were the plants having the highest Fidelity Level for their use, each scored 100.00 percent, followed by Albuca setosa (83.33 percent). These plants were then selected for validation studies. Gas-Chromatography-Mass-Spectrometry (GC-MS) revealed 7, 33, 26 and 32 bioactive phytochemicals in A. ferox, E. elephantina, A. oppositifolia and A. setosa, respectively. Terpenes and fatty acids were present, oxygenated terpenes being the most abundant hydrocarbons present in all the four plant species. The effect of acetone, methanol and ethanol extracts of leaves of Aloe ferox and Acokanthera oppositifolia on tick repellency and acaricidal activity were investigated on blood engorged Ambylomma hebraeum and Rhipicephalus decoloratus ticks at concentration 15, 30 and 50 percent. The 30 and 50 percent acetone extract of A. ferox and Dazzel dip had the highest acaricidal properties of 100 percent. The 50 percent methanol extract of A. oppositifolia and 50 percent acetone extract of A. ferox had the highest repellency activity of 89 percent and 85.33 percent, respectively. Results from this study revealed that the efficacy of medicinal plants used by farmers to control ticks vary with the type of solvent used for extracting the bioactive compounds. Furthermore, it revealed that Aloe ferox and A. opppositifolia plant extracts possess repellent and acaricidal activities. In a study to investigate the anthelminthic effect of crude extracts of Elephantorrhiza elephantina and Albuca setosa plants, significant anthelminthic effect on nematodes was observed in both plants. In this study, all E. elephantina and A. setosa extracts caused paralysis and mortality. Methanol was the most effective solvent in extracting bioactive compounds and methanol extract showed the best anthelminthic effects among the crude extracts investigated in both plants. The least time taken for the worms to be paralysed was 8.33 mins and 14.33mins in 100mg/ml methanol extracts of E. elephantina and A. setosa, resepectively. Methanol extract of E. elephantina and A. setosa (100mg/ml) had the highest anthelminthic activity and mortality was recorded after 18mins and 20mins, respectively. Results from this study revealed that these two plants possess anthelminthic activities. The study revealed that resource-limited farmers use medicinal plants to control internal and external parasites in goats. Gas-Chromatography-Mass-Spectrometry analysis showed that these plants contain bioactive compounds that have a potential in controlling parasites. Validation studies showed that A. ferox and A. oppositifolia possess repellent and acaricidal activities whereas A. setosa and E. elephantina possess anthelminthic activities.
- Full Text:
- Date Issued: 2015
- Authors: Sanhokwe, Marcia
- Date: 2015
- Subjects: Medicinal plants -- South Africa -- Eastern Cape Goats -- Parasites -- Control
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2249 , vital:27718
- Description: The broad objective of the study was to determine and validate medicinal plants used by resource-limited farmers to control internal and external parasites in goats in the Eastern Cape Province, South Africa. A survey was conducted among 50 farmers and three herbalists to determine medicinal plants used to control parasites in goats. The survey revealed nine plant species belonging to eight families that were used. Among the identified plant species, Aloe ferox, Acokanthera oppositifolia and Elephantorrhiza elephantina were the plants having the highest Fidelity Level for their use, each scored 100.00 percent, followed by Albuca setosa (83.33 percent). These plants were then selected for validation studies. Gas-Chromatography-Mass-Spectrometry (GC-MS) revealed 7, 33, 26 and 32 bioactive phytochemicals in A. ferox, E. elephantina, A. oppositifolia and A. setosa, respectively. Terpenes and fatty acids were present, oxygenated terpenes being the most abundant hydrocarbons present in all the four plant species. The effect of acetone, methanol and ethanol extracts of leaves of Aloe ferox and Acokanthera oppositifolia on tick repellency and acaricidal activity were investigated on blood engorged Ambylomma hebraeum and Rhipicephalus decoloratus ticks at concentration 15, 30 and 50 percent. The 30 and 50 percent acetone extract of A. ferox and Dazzel dip had the highest acaricidal properties of 100 percent. The 50 percent methanol extract of A. oppositifolia and 50 percent acetone extract of A. ferox had the highest repellency activity of 89 percent and 85.33 percent, respectively. Results from this study revealed that the efficacy of medicinal plants used by farmers to control ticks vary with the type of solvent used for extracting the bioactive compounds. Furthermore, it revealed that Aloe ferox and A. opppositifolia plant extracts possess repellent and acaricidal activities. In a study to investigate the anthelminthic effect of crude extracts of Elephantorrhiza elephantina and Albuca setosa plants, significant anthelminthic effect on nematodes was observed in both plants. In this study, all E. elephantina and A. setosa extracts caused paralysis and mortality. Methanol was the most effective solvent in extracting bioactive compounds and methanol extract showed the best anthelminthic effects among the crude extracts investigated in both plants. The least time taken for the worms to be paralysed was 8.33 mins and 14.33mins in 100mg/ml methanol extracts of E. elephantina and A. setosa, resepectively. Methanol extract of E. elephantina and A. setosa (100mg/ml) had the highest anthelminthic activity and mortality was recorded after 18mins and 20mins, respectively. Results from this study revealed that these two plants possess anthelminthic activities. The study revealed that resource-limited farmers use medicinal plants to control internal and external parasites in goats. Gas-Chromatography-Mass-Spectrometry analysis showed that these plants contain bioactive compounds that have a potential in controlling parasites. Validation studies showed that A. ferox and A. oppositifolia possess repellent and acaricidal activities whereas A. setosa and E. elephantina possess anthelminthic activities.
- Full Text:
- Date Issued: 2015
Female identity in the post-millennial Nigerian novel: a study of Adichie, Atta, and Unigwe
- Authors: Wambui, Mary Theru
- Date: 2015
- Subjects: Adichie, Chimamanda Ngozi, 1977- -- Criticism and interpretation , Adichie, Chimamanda Ngozi, 1977-. Purple hibiscus , Atta, Sefi -- Criticism and interpretation , Atta, Sefi -- Everything good will come , Unigwe, Chika. Criticism and interpretation , Unigwe, Chika. Fata Morgana -- English , Nigerian fiction -- History and criticism , Women -- Identity , Women in literature , Feminism in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2330 , http://hdl.handle.net/10962/d1020013
- Description: This thesis project examines the work of three female Nigerian authors: Chimamanda Ngozi Adichie, Sefi Atta and Chika Unigwe. They are part of a growing number of young African writers who are receiving international acclaim and challenging narratives that have long defined the continent in pejorative terms. They question what it means to be female and African in a transcultural, global world but counter discourses that are both restrictive and prescriptive. Their female characters are not imaged in binary terms as either victims or villains. For all three writers, the African story has to be told in its entirety incorporating what some may argue are negative stereotypes but doing so in a manner that examines and undermines those same stereotypes. For the purposes of the thesis, I focus on their first novels: Adichie’s Purple Hibiscus, Atta’s Everything Good Will Come and Unigwe’s On Black Sisters’ Street. Chapter One examines Purple Hibiscus and argues that the novel is much more than a coming of age story or, as some critics have posited, an allegory of the postcolonial state. Chapter Two highlights Atta’s use of fairly familiar feminist theories but grounds them in the lived realities of the African city. All three authors are concerned with issues of violence and death. Unigwe’s novel, which forms the focus of Chapter Three, offers a critical perspective on how both of those themes intersect with the increasing commercialisation of global culture. Her characters are female sex workers whose lives are irrevocably altered by the murder of one of their colleagues. I conclude by arguing that the three novels offer a nuanced if not necessarily new understanding of the various social, economic and political forces that continue to shape the lives of women on the continent.
- Full Text:
- Date Issued: 2015
- Authors: Wambui, Mary Theru
- Date: 2015
- Subjects: Adichie, Chimamanda Ngozi, 1977- -- Criticism and interpretation , Adichie, Chimamanda Ngozi, 1977-. Purple hibiscus , Atta, Sefi -- Criticism and interpretation , Atta, Sefi -- Everything good will come , Unigwe, Chika. Criticism and interpretation , Unigwe, Chika. Fata Morgana -- English , Nigerian fiction -- History and criticism , Women -- Identity , Women in literature , Feminism in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2330 , http://hdl.handle.net/10962/d1020013
- Description: This thesis project examines the work of three female Nigerian authors: Chimamanda Ngozi Adichie, Sefi Atta and Chika Unigwe. They are part of a growing number of young African writers who are receiving international acclaim and challenging narratives that have long defined the continent in pejorative terms. They question what it means to be female and African in a transcultural, global world but counter discourses that are both restrictive and prescriptive. Their female characters are not imaged in binary terms as either victims or villains. For all three writers, the African story has to be told in its entirety incorporating what some may argue are negative stereotypes but doing so in a manner that examines and undermines those same stereotypes. For the purposes of the thesis, I focus on their first novels: Adichie’s Purple Hibiscus, Atta’s Everything Good Will Come and Unigwe’s On Black Sisters’ Street. Chapter One examines Purple Hibiscus and argues that the novel is much more than a coming of age story or, as some critics have posited, an allegory of the postcolonial state. Chapter Two highlights Atta’s use of fairly familiar feminist theories but grounds them in the lived realities of the African city. All three authors are concerned with issues of violence and death. Unigwe’s novel, which forms the focus of Chapter Three, offers a critical perspective on how both of those themes intersect with the increasing commercialisation of global culture. Her characters are female sex workers whose lives are irrevocably altered by the murder of one of their colleagues. I conclude by arguing that the three novels offer a nuanced if not necessarily new understanding of the various social, economic and political forces that continue to shape the lives of women on the continent.
- Full Text:
- Date Issued: 2015
Understanding how students' relationships with their cellphones inform their experience of social participation online and offline
- Authors: Oosthuizen, Jess
- Date: 2015
- Subjects: Cell phones -- South Africa -- Psychological aspects , Social participation , Cell phones -- South Africa -- Social aspects , College students -- South Africa , Social media addiction
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3264 , http://hdl.handle.net/10962/d1017887
- Description: The pervasive presence of cellphones in the lives of urban young people around the globe has led to widespread research to evaluate the impact that this device has on young people’s overall psychosocial development. This relationship is often characterised as “addictive”. This research study presents a unique South African youth perspective in a field of research that is predominantly conducted in the United States, Europe and Asia. It explores the relationship that students (ages 18–21) at Rhodes University have with their cellphones in order to understand how this device informs their experience of social participation online and offline. Central to the design of this study is a “social media detox” which involved the research participants volunteering to restrict their social media and cellphone use for an agreed-upon period of time. The study employs interpretative phenomenological analysis (IPA) to uncover key themes from in-depth interviews before and after the detox. Eight respondents were interviewed twice; once before and once after their detox. This study provides insights into the integral role of a cellphone as reported from a young adult’s perspective. Communicating on social media platforms using a cellphone has become normalised among this age-group and the respondents described how the cellphone feels like “a part of you”. Unlike interacting face-to-face which is potentially awkward and involves effort, socialising on a cellphone offers the respondents a sense of companionship, control and instant access to their peer groups. The respondents in this study seemed unaware of their own agency in social situations until their participation in the social media detox. By participating in this study, the participants became more aware of how their cellphone use influences social behaviour, both online and offline. The study proposes that the term “addiction” undermines the positive association young people have with their cellphones. Instead, this study suggests that “social fitness” would be a more relevant construct through which to encourage and support young people to exercise agency in their social lives. This exploratory study raises new questions for researchers, programme developers and educators to take up in future studies and programme development
- Full Text:
- Date Issued: 2015
- Authors: Oosthuizen, Jess
- Date: 2015
- Subjects: Cell phones -- South Africa -- Psychological aspects , Social participation , Cell phones -- South Africa -- Social aspects , College students -- South Africa , Social media addiction
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3264 , http://hdl.handle.net/10962/d1017887
- Description: The pervasive presence of cellphones in the lives of urban young people around the globe has led to widespread research to evaluate the impact that this device has on young people’s overall psychosocial development. This relationship is often characterised as “addictive”. This research study presents a unique South African youth perspective in a field of research that is predominantly conducted in the United States, Europe and Asia. It explores the relationship that students (ages 18–21) at Rhodes University have with their cellphones in order to understand how this device informs their experience of social participation online and offline. Central to the design of this study is a “social media detox” which involved the research participants volunteering to restrict their social media and cellphone use for an agreed-upon period of time. The study employs interpretative phenomenological analysis (IPA) to uncover key themes from in-depth interviews before and after the detox. Eight respondents were interviewed twice; once before and once after their detox. This study provides insights into the integral role of a cellphone as reported from a young adult’s perspective. Communicating on social media platforms using a cellphone has become normalised among this age-group and the respondents described how the cellphone feels like “a part of you”. Unlike interacting face-to-face which is potentially awkward and involves effort, socialising on a cellphone offers the respondents a sense of companionship, control and instant access to their peer groups. The respondents in this study seemed unaware of their own agency in social situations until their participation in the social media detox. By participating in this study, the participants became more aware of how their cellphone use influences social behaviour, both online and offline. The study proposes that the term “addiction” undermines the positive association young people have with their cellphones. Instead, this study suggests that “social fitness” would be a more relevant construct through which to encourage and support young people to exercise agency in their social lives. This exploratory study raises new questions for researchers, programme developers and educators to take up in future studies and programme development
- Full Text:
- Date Issued: 2015
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