A moderate elevation in [CO 2] results in potential hypervirulence on SABBIErica
- Gallagher, Sean, Hill, Jaclyn M, Murugan, N, Botha, Christiaan E J
- Authors: Gallagher, Sean , Hill, Jaclyn M , Murugan, N , Botha, Christiaan E J
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68835 , vital:29329 , https://doi.org/10.1016/j.sajb.2017.10.010
- Description: The Russian Wheat Aphid (Diuraphis noxia Kurdjumov, 1913) (RWA) is a serious pest of grain crops and is of considerable concern in South Africa, particularly in terms of barley grown specifically for the brewing industry. This paper highlights the effect of a small (50 ppm) increase in [CO2] on the growth rate of the four South African RWA biotypes on the SABBIErica barley cultivar. Controlled environment experiments revealed that the colony growth rate for RWASA4 was significantly lower than SA1 under ambient conditions as well as significantly lower than SA1, SA2 or SA3 under elevated CO2 conditions. The unexpected difference suggested an atypical, non-preferential feeding habit on SABBIErica, for RWASA4. The small RWASA4 colonies inflicted similar morphological damage to the significantly larger RWASA1 – RWASA3 biotype populations — indicative of potential hypervirulence under elevated CO2. The continuous feeding of RWASA biotypes causes damage to the transport system as well as substantial, catastrophic damage to mesophyll chloroplasts as well as mitochondria within the host plant's leaves. The TEM study revealed evidence of sequential/systematic degeneration of chloroplasts and mitochondria with continued aphid feeding, which we suggest is an indication of potential emergent hypervirulence under elevated CO2 conditions.
- Full Text: false
- Date Issued: 2017
- Authors: Gallagher, Sean , Hill, Jaclyn M , Murugan, N , Botha, Christiaan E J
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68835 , vital:29329 , https://doi.org/10.1016/j.sajb.2017.10.010
- Description: The Russian Wheat Aphid (Diuraphis noxia Kurdjumov, 1913) (RWA) is a serious pest of grain crops and is of considerable concern in South Africa, particularly in terms of barley grown specifically for the brewing industry. This paper highlights the effect of a small (50 ppm) increase in [CO2] on the growth rate of the four South African RWA biotypes on the SABBIErica barley cultivar. Controlled environment experiments revealed that the colony growth rate for RWASA4 was significantly lower than SA1 under ambient conditions as well as significantly lower than SA1, SA2 or SA3 under elevated CO2 conditions. The unexpected difference suggested an atypical, non-preferential feeding habit on SABBIErica, for RWASA4. The small RWASA4 colonies inflicted similar morphological damage to the significantly larger RWASA1 – RWASA3 biotype populations — indicative of potential hypervirulence under elevated CO2. The continuous feeding of RWASA biotypes causes damage to the transport system as well as substantial, catastrophic damage to mesophyll chloroplasts as well as mitochondria within the host plant's leaves. The TEM study revealed evidence of sequential/systematic degeneration of chloroplasts and mitochondria with continued aphid feeding, which we suggest is an indication of potential emergent hypervirulence under elevated CO2 conditions.
- Full Text: false
- Date Issued: 2017
Dridex: Analysis of the traffic and automatic generation of IOCs
- Rudman, Lauren, Irwin, Barry V W
- Authors: Rudman, Lauren , Irwin, Barry V W
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429525 , vital:72619 , https://ieeexplore.ieee.org/abstract/document/7802932
- Description: In this paper we present a framework that generates network Indicators of Compromise (IOC) automatically from a malware sample after dynamic runtime analysis. The framework addresses the limitations of manual Indicator of Compromise generation and utilises sandbox environment to perform the malware analysis in. We focus on the generation of network based IOCs from captured traffic files (PCAPs) generated by the dynamic malware analysis. The Cuckoo Sandbox environment is used for the analysis and the setup is described in detail. Accordingly, we discuss the concept of IOCs and the popular formats used as there is currently no standard. As an example of how the proof-of-concept framework can be used, we chose 100 Dridex malware samples and evaluated the traffic and showed what can be used for the generation of network-based IOCs. Results of our system confirm that we can create IOCs from dynamic malware analysis and avoid the legitimate background traffic originating from the sandbox system. We also briefly discuss the sharing of, and application of the generated IOCs and the number of systems that can be used to share them. Lastly we discuss how they can be useful in combating cyber threats.
- Full Text:
- Date Issued: 2016
- Authors: Rudman, Lauren , Irwin, Barry V W
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429525 , vital:72619 , https://ieeexplore.ieee.org/abstract/document/7802932
- Description: In this paper we present a framework that generates network Indicators of Compromise (IOC) automatically from a malware sample after dynamic runtime analysis. The framework addresses the limitations of manual Indicator of Compromise generation and utilises sandbox environment to perform the malware analysis in. We focus on the generation of network based IOCs from captured traffic files (PCAPs) generated by the dynamic malware analysis. The Cuckoo Sandbox environment is used for the analysis and the setup is described in detail. Accordingly, we discuss the concept of IOCs and the popular formats used as there is currently no standard. As an example of how the proof-of-concept framework can be used, we chose 100 Dridex malware samples and evaluated the traffic and showed what can be used for the generation of network-based IOCs. Results of our system confirm that we can create IOCs from dynamic malware analysis and avoid the legitimate background traffic originating from the sandbox system. We also briefly discuss the sharing of, and application of the generated IOCs and the number of systems that can be used to share them. Lastly we discuss how they can be useful in combating cyber threats.
- Full Text:
- Date Issued: 2016
Exploratory mathematics talk in a second language: a sociolinguistic perspective:
- Graven, Mellony, Robertson, Sally-Ann
- Authors: Graven, Mellony , Robertson, Sally-Ann
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69907 , vital:29594 , https://doi.org/10.1007/s11858-018-0952-2
- Description: This paper illuminates challenges confronting teachers and students at the literacy/numeracy interface in contexts where students have not developed sufficient English language proficiency to be learning mathematics through English but, due to socio-politically and economically driven perceptions are being taught in English. We analyse transcript data of classroom talk in a South African grade 4 mathematics lesson on fractions. Together with interview data, the lesson data highlight some of the consequences students’ diminished access to their home language appear to have on their access to mathematical meaning-making.
- Full Text:
- Date Issued: 2009
- Authors: Graven, Mellony , Robertson, Sally-Ann
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69907 , vital:29594 , https://doi.org/10.1007/s11858-018-0952-2
- Description: This paper illuminates challenges confronting teachers and students at the literacy/numeracy interface in contexts where students have not developed sufficient English language proficiency to be learning mathematics through English but, due to socio-politically and economically driven perceptions are being taught in English. We analyse transcript data of classroom talk in a South African grade 4 mathematics lesson on fractions. Together with interview data, the lesson data highlight some of the consequences students’ diminished access to their home language appear to have on their access to mathematical meaning-making.
- Full Text:
- Date Issued: 2009
Using a transdisciplinary framework to examine mathematics classroom talk taking place in and through a second language
- Graven, Mellony, Robertson, Sally-Ann
- Authors: Graven, Mellony , Robertson, Sally-Ann
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69838 , vital:29586 , https://DOI: 10.1007/s11858-018-0952-2
- Description: This paper proposes a transdisciplinary framework to allow for a multifocal exploration of classroom talk practices. It draws on data from a broader study of talk in South African Grade 4 mathematics classrooms where the language of teaching and learning (English) was the home language for neither the teachers nor their students. Lesson transcript data from one teacher’s lessons on fractions are used to demonstrate how working with three strands of conceptual insight from the disciplines of psychology, sociology and linguistics conduces to a potentially richer understanding of a teacher’s use of classroom talk in mediating her students’ mathematical understanding. By drawing on elements of Vygotsky’s sociocultural psychology, we make visible in the lesson data the ways in which this teacher used the ‘everyday’ in trying to navigate her students’ towards more ‘scientific’ conceptualizations of unit fractions. By then taking up aspects of Bernstein’s sociological work, we articulate, and make visible, how societal circumstances impinge on students’ access to exploratory mathematical discourse needed for epistemological access to abstract and generalized mathematical concepts. Finally, through Halliday’s work on the power of particular linguistic registers for meaning-making, we highlight challenges in learning mathematics in and through a second language and reveal the constraints placed on students’ opportunity to maximally exploit the distinct forms of meaning contained within the mathematics register.
- Full Text:
- Date Issued: 2009
- Authors: Graven, Mellony , Robertson, Sally-Ann
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69838 , vital:29586 , https://DOI: 10.1007/s11858-018-0952-2
- Description: This paper proposes a transdisciplinary framework to allow for a multifocal exploration of classroom talk practices. It draws on data from a broader study of talk in South African Grade 4 mathematics classrooms where the language of teaching and learning (English) was the home language for neither the teachers nor their students. Lesson transcript data from one teacher’s lessons on fractions are used to demonstrate how working with three strands of conceptual insight from the disciplines of psychology, sociology and linguistics conduces to a potentially richer understanding of a teacher’s use of classroom talk in mediating her students’ mathematical understanding. By drawing on elements of Vygotsky’s sociocultural psychology, we make visible in the lesson data the ways in which this teacher used the ‘everyday’ in trying to navigate her students’ towards more ‘scientific’ conceptualizations of unit fractions. By then taking up aspects of Bernstein’s sociological work, we articulate, and make visible, how societal circumstances impinge on students’ access to exploratory mathematical discourse needed for epistemological access to abstract and generalized mathematical concepts. Finally, through Halliday’s work on the power of particular linguistic registers for meaning-making, we highlight challenges in learning mathematics in and through a second language and reveal the constraints placed on students’ opportunity to maximally exploit the distinct forms of meaning contained within the mathematics register.
- Full Text:
- Date Issued: 2009
Beneficial effects of medicinal plants in fish diseases
- Stratev, Deyan, Zhelyazkov, Georgi, Noundou, Xavier Siwe, Krause, Rui W M
- Authors: Stratev, Deyan , Zhelyazkov, Georgi , Noundou, Xavier Siwe , Krause, Rui W M
- Date: 2008
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123487 , vital:35447 , https://doi.org/10.1007/s10499-017-0219-x
- Description: Fish are constantly in contact with pathogens inhabiting water. High population density as well as poor hydrodynamic conditions and feeding lead to an increased sensitivity towards infections. In order to prevent major economic losses due to diseases, various medications are used for treatment and prevention of infections. The use of antimicrobial drugs in aquacultures could lead to emergence of resistance in pathogenic microorganisms. Alternatives are being sought over the last few years to replace antibiotics, and medicinal plants are one of available options for this purpose. These plants are rich in secondary metabolites and phytochemical compounds, which have an effect against viral, bacterial, and parasitic diseases in fish. Their main advantage is their natural origin and most of these plants do not represent threat for human health, the fish, and the environment. The goal of this review is to present information on the treatment of viral, bacterial, and parasitic diseases in fish through medicinal plants, with focus on the mechanisms of action of the identified secondary metabolites, fractions, or plant extracts.
- Full Text:
- Date Issued: 2008
- Authors: Stratev, Deyan , Zhelyazkov, Georgi , Noundou, Xavier Siwe , Krause, Rui W M
- Date: 2008
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123487 , vital:35447 , https://doi.org/10.1007/s10499-017-0219-x
- Description: Fish are constantly in contact with pathogens inhabiting water. High population density as well as poor hydrodynamic conditions and feeding lead to an increased sensitivity towards infections. In order to prevent major economic losses due to diseases, various medications are used for treatment and prevention of infections. The use of antimicrobial drugs in aquacultures could lead to emergence of resistance in pathogenic microorganisms. Alternatives are being sought over the last few years to replace antibiotics, and medicinal plants are one of available options for this purpose. These plants are rich in secondary metabolites and phytochemical compounds, which have an effect against viral, bacterial, and parasitic diseases in fish. Their main advantage is their natural origin and most of these plants do not represent threat for human health, the fish, and the environment. The goal of this review is to present information on the treatment of viral, bacterial, and parasitic diseases in fish through medicinal plants, with focus on the mechanisms of action of the identified secondary metabolites, fractions, or plant extracts.
- Full Text:
- Date Issued: 2008
Fundal pressure during the second stage of labour
- Hofmeyr, Georges Justus, Vogel, Joshua. P, Cuthbert, Anna, Singata, Mandisa
- Authors: Hofmeyr, Georges Justus , Vogel, Joshua. P , Cuthbert, Anna , Singata, Mandisa
- Date: 03-2017
- Subjects: South Africa Pregnancy Computer File
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/5766 , vital:44640 , https://DOI:10.1002/14651858.CD006067.pub3
- Description: Background Fundal pressure during the second stage of labour (also known as the 'Kristeller manoeuvre') involves application of manual pressure to the uppermost part of the uterus directed towards the birth canal, in an attempt to assist spontaneous vaginal birth and avoid prolonged second stage orthe need for operative birth. Fundal pressure has also been applied using an inflatable belt. Fundal pressure is widely used, however methods of its use vary widely. Despite strongly held opinions in favour of and against the use of fundal pressure, there is limited evidence regarding its maternal and neonatal benefits and harms. There is a need for objective evaluation of the eGectiveness and safety of fundal pressure in the second stage of labour. Objectives To determine if fundal pressure is eGective in achieving spontaneous vaginal birth, and preventing prolonged second stage or the need for operative birth, and to explore maternal and neonatal adverse eGects related to fundal pressure. Search methods We searched Cochrane Pregnancy and Childbirth's Trials Register (30 November 2016) and reference lists of retrieved studies. Selection criteria Randomised and quasi-randomised controlled trials of fundal pressure (manual or by inflatable belt) versus no fundal pressure in women in the second stage of labour with singleton cephalic presentation. Data collection and analysis Two or more review authors independently assessed potential studies for inclusion and quality. We extracted data using a pre-designed form. We entered data into Review Manager 5 soAware and checked for accuracy. Main results Nine trials are included in this updated review. Five trials (3057 women) compared manual fundal pressure versus no fundal pressure. Four trials (891 women) compared fundal pressure by means of an inflatable belt versus no fundal pressure. It was not possible to blind women and staG to this intervention. We assessed two trials as being at high risk of attrition bias and another at high risk of reporting bias. All other trials were low or unclear for other risk of bias domains. Most of the trials had design limitations. Heterogeneity was high for the majority of outcomes. Manual fundal pressure versus no fundal pressure Manual fundal pressure was not associated with changes in: spontaneous vaginal birth within a specified time (risk ratio (RR) 0.96, 95% confidence interval (CI) 0.71 to 1.28; 120 women; 1 trial; very low-quality evidence), instrumental births (RR 3.28, 95% CI 0.14 to 79.65; 197 women; 1 trial), caesarean births (RR 1.10, 95% CI 0.07 to 17.27; 197 women; 1 trial), operative birth (average RR 0.66, 95% CI 0.12 to 3.55; 317 women; 2 studies; I2 = 43%; Tau2 = 0.71; very low-quality evidence), duration of second stage (mean diGerence (MD) -0.80 minutes, 95% CI -3.66 to 2.06 minutes; 194 women; 1 study; very low-quality evidence), low arterial cord pH in newborn babies (RR 1.07, 95% CI 0.72 to 1.58; 297 women; 2 trials; very low-quality evidence), or Apgar scores less than seven at five minutes (average RR 4.48, 95% CI 0.28 to 71.45; 2759 infants; 4 trials; I2 = 89%; Tau2 = 3.55; very low-quality evidence). More women who received manual fundal pressure had cervical tears than in the control group (RR 4.90, 95% CI 1.09 to 21.98; 295 women; 1 trial). No neonatal deaths occurred in either of the two studies reporting this outcome (very low-quality evidence). No trial reported the outcome severe maternal morbidity or death. Fundal pressure by inflatable belt versus no fundal pressure Fundal pressure by inflatable belt did not reduce the number of women havinginstrumental births (average RR 0.73, 95% CI 0.52 to 1.02; 891 women; 4 trials; I2 = 52%; Tau2 = 0.05) or operative births (average RR 0.62, 95% CI 0.38 to 1.01; 891 women; 4 trials; I2 = 78%; Tau2 = 0.14; very low-quality evidence). Heterogeneity was high for both outcomes. Duration of second stage was reported in two trials, which both showed that inflatable belts shortened duration of labour in nulliparous women (average MD -50.80 minutes, 95% CI -94.85 to -6.74 minutes; 253 women; 2 trials; I2 = 97%; Tau2 = 975.94; very low-quality evidence). No data on this outcome were available for multiparous women. The inflatable belt did not make any diGerence to rates of caesarean births (average RR 0.56, 95% CI 0.14 to 2.26; 891 women; 4 trials; I2 = 70%; Tau2 = 0.98), low arterial cord pHin newborn babies (RR 0.47, 95% CI 0.09 to 2.55; 461 infants; 1 trial; low-quality evidence), or Apgar scores less than seven atfive minutes (RR 4.62, 95% CI 0.22 to 95.68; 500 infants; 1 trial; very low-quality evidence). Third degree perinealtears were increased in the inflatable belt group (RR 15.69, 95% CI 2.10 to 117.02; 500 women; 1 trial). Spontaneous vaginal birth within a specified time, neonatal death, andsevere maternal morbidity or death were not reported in any trial. Authors' conclusions There is insuGicient evidence to draw conclusions on the beneficial or harmful eGects of fundal pressure, either manually or by inflatable belt. Fundal pressure by an inflatable belt during the second stage of labour may shorten duration of second stage for nulliparous women, and lower rates of operative birth. However, existing studies are small and their generalizability is uncertain. There is insuGicient evidence regarding safety for the baby. There is no evidence on the use of fundal pressure in specific clinical settings such as inability of the mother to bear down due to exhaustion or unconsciousness. There is currently insuGicient evidence for the routine use of fundal pressure by any method on women in the second stage of labour. Because of current widespread use of the procedure and the potential for use in settings where other methods of assisted birth are not available, further good quality trials are needed. Further evaluation in other groups of women (such as multiparous women) will also be required. Future research should describe in detail how fundal pressure was applied and consider safety of the unborn baby, perineal outcomes, longer-term maternal and infant outcomes and maternal satisfaction.
- Full Text:
- Date Issued: 03-2017
- Authors: Hofmeyr, Georges Justus , Vogel, Joshua. P , Cuthbert, Anna , Singata, Mandisa
- Date: 03-2017
- Subjects: South Africa Pregnancy Computer File
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/5766 , vital:44640 , https://DOI:10.1002/14651858.CD006067.pub3
- Description: Background Fundal pressure during the second stage of labour (also known as the 'Kristeller manoeuvre') involves application of manual pressure to the uppermost part of the uterus directed towards the birth canal, in an attempt to assist spontaneous vaginal birth and avoid prolonged second stage orthe need for operative birth. Fundal pressure has also been applied using an inflatable belt. Fundal pressure is widely used, however methods of its use vary widely. Despite strongly held opinions in favour of and against the use of fundal pressure, there is limited evidence regarding its maternal and neonatal benefits and harms. There is a need for objective evaluation of the eGectiveness and safety of fundal pressure in the second stage of labour. Objectives To determine if fundal pressure is eGective in achieving spontaneous vaginal birth, and preventing prolonged second stage or the need for operative birth, and to explore maternal and neonatal adverse eGects related to fundal pressure. Search methods We searched Cochrane Pregnancy and Childbirth's Trials Register (30 November 2016) and reference lists of retrieved studies. Selection criteria Randomised and quasi-randomised controlled trials of fundal pressure (manual or by inflatable belt) versus no fundal pressure in women in the second stage of labour with singleton cephalic presentation. Data collection and analysis Two or more review authors independently assessed potential studies for inclusion and quality. We extracted data using a pre-designed form. We entered data into Review Manager 5 soAware and checked for accuracy. Main results Nine trials are included in this updated review. Five trials (3057 women) compared manual fundal pressure versus no fundal pressure. Four trials (891 women) compared fundal pressure by means of an inflatable belt versus no fundal pressure. It was not possible to blind women and staG to this intervention. We assessed two trials as being at high risk of attrition bias and another at high risk of reporting bias. All other trials were low or unclear for other risk of bias domains. Most of the trials had design limitations. Heterogeneity was high for the majority of outcomes. Manual fundal pressure versus no fundal pressure Manual fundal pressure was not associated with changes in: spontaneous vaginal birth within a specified time (risk ratio (RR) 0.96, 95% confidence interval (CI) 0.71 to 1.28; 120 women; 1 trial; very low-quality evidence), instrumental births (RR 3.28, 95% CI 0.14 to 79.65; 197 women; 1 trial), caesarean births (RR 1.10, 95% CI 0.07 to 17.27; 197 women; 1 trial), operative birth (average RR 0.66, 95% CI 0.12 to 3.55; 317 women; 2 studies; I2 = 43%; Tau2 = 0.71; very low-quality evidence), duration of second stage (mean diGerence (MD) -0.80 minutes, 95% CI -3.66 to 2.06 minutes; 194 women; 1 study; very low-quality evidence), low arterial cord pH in newborn babies (RR 1.07, 95% CI 0.72 to 1.58; 297 women; 2 trials; very low-quality evidence), or Apgar scores less than seven at five minutes (average RR 4.48, 95% CI 0.28 to 71.45; 2759 infants; 4 trials; I2 = 89%; Tau2 = 3.55; very low-quality evidence). More women who received manual fundal pressure had cervical tears than in the control group (RR 4.90, 95% CI 1.09 to 21.98; 295 women; 1 trial). No neonatal deaths occurred in either of the two studies reporting this outcome (very low-quality evidence). No trial reported the outcome severe maternal morbidity or death. Fundal pressure by inflatable belt versus no fundal pressure Fundal pressure by inflatable belt did not reduce the number of women havinginstrumental births (average RR 0.73, 95% CI 0.52 to 1.02; 891 women; 4 trials; I2 = 52%; Tau2 = 0.05) or operative births (average RR 0.62, 95% CI 0.38 to 1.01; 891 women; 4 trials; I2 = 78%; Tau2 = 0.14; very low-quality evidence). Heterogeneity was high for both outcomes. Duration of second stage was reported in two trials, which both showed that inflatable belts shortened duration of labour in nulliparous women (average MD -50.80 minutes, 95% CI -94.85 to -6.74 minutes; 253 women; 2 trials; I2 = 97%; Tau2 = 975.94; very low-quality evidence). No data on this outcome were available for multiparous women. The inflatable belt did not make any diGerence to rates of caesarean births (average RR 0.56, 95% CI 0.14 to 2.26; 891 women; 4 trials; I2 = 70%; Tau2 = 0.98), low arterial cord pHin newborn babies (RR 0.47, 95% CI 0.09 to 2.55; 461 infants; 1 trial; low-quality evidence), or Apgar scores less than seven atfive minutes (RR 4.62, 95% CI 0.22 to 95.68; 500 infants; 1 trial; very low-quality evidence). Third degree perinealtears were increased in the inflatable belt group (RR 15.69, 95% CI 2.10 to 117.02; 500 women; 1 trial). Spontaneous vaginal birth within a specified time, neonatal death, andsevere maternal morbidity or death were not reported in any trial. Authors' conclusions There is insuGicient evidence to draw conclusions on the beneficial or harmful eGects of fundal pressure, either manually or by inflatable belt. Fundal pressure by an inflatable belt during the second stage of labour may shorten duration of second stage for nulliparous women, and lower rates of operative birth. However, existing studies are small and their generalizability is uncertain. There is insuGicient evidence regarding safety for the baby. There is no evidence on the use of fundal pressure in specific clinical settings such as inability of the mother to bear down due to exhaustion or unconsciousness. There is currently insuGicient evidence for the routine use of fundal pressure by any method on women in the second stage of labour. Because of current widespread use of the procedure and the potential for use in settings where other methods of assisted birth are not available, further good quality trials are needed. Further evaluation in other groups of women (such as multiparous women) will also be required. Future research should describe in detail how fundal pressure was applied and consider safety of the unborn baby, perineal outcomes, longer-term maternal and infant outcomes and maternal satisfaction.
- Full Text:
- Date Issued: 03-2017
An (auto)-biographical account of nursing transformation: 1970-2018
- Authors: Ricks, Esmeralda Jennifer
- Subjects: Nursing -- Study and teaching , Nursing -- South Africa
- Language: English
- Type: text , An (auto)-biographical account of nursing transformation: 1970-2018 , Lectures
- Identifier: http://hdl.handle.net/10948/21055 , vital:29434
- Description: This lecture provides a description of how nursing education and practice, research and technology has transformed over the past 48 years. The information provided in this lecture is based on personal experience and own research, and research of various other authors. The first part of the lecture provides an overview of the era in which I trained and is used as a benchmark to compare current day practices. The changes in nursing education and practice with regard to the Nursing Act and regulations over the past 48 years are highlighted, depicting the number of times that the different nursing acts and regulations were amended with regard to all basic nursing qualification programmes. This lecture also includes a brief discussion of the new nursing education programme that will be implemented soon, as well as its opportunities and challenges. A detailed description is provided with regard to how nursing research has evolved over the past 48 years because of the dedication and vision that nurse leaders have for the profession. A national nursing strategy has been developed to enhance collaborative, rigorous scientific enquiry that builds a significant body of knowledge in order to improve the health of the people of South Africa. It is envisaged that the research strategy will contribute significantly to directing future nursing research development in South Africa. It is evident in this lecture that the use of technology in nursing has truly evolved and can be seen as a major driver of changes in the nursing profession. There are huge shifts in how patient records are maintained, how medications are tracked and ordered, how care is passed from one provider to another, how blood and X-ray results are retrieved and how information is being accessed at the point of care in nursing. In today’s healthcare system technology is the foundation of the future. Today’s nurses must not only know how to care for patients, but how to use technology safely and appropriately in their day-to-day work. It is evident that nursing has transformed in many ways since 1970 and that nurses have always been the drivers of nursing transformation.
- Full Text:
- Authors: Ricks, Esmeralda Jennifer
- Subjects: Nursing -- Study and teaching , Nursing -- South Africa
- Language: English
- Type: text , An (auto)-biographical account of nursing transformation: 1970-2018 , Lectures
- Identifier: http://hdl.handle.net/10948/21055 , vital:29434
- Description: This lecture provides a description of how nursing education and practice, research and technology has transformed over the past 48 years. The information provided in this lecture is based on personal experience and own research, and research of various other authors. The first part of the lecture provides an overview of the era in which I trained and is used as a benchmark to compare current day practices. The changes in nursing education and practice with regard to the Nursing Act and regulations over the past 48 years are highlighted, depicting the number of times that the different nursing acts and regulations were amended with regard to all basic nursing qualification programmes. This lecture also includes a brief discussion of the new nursing education programme that will be implemented soon, as well as its opportunities and challenges. A detailed description is provided with regard to how nursing research has evolved over the past 48 years because of the dedication and vision that nurse leaders have for the profession. A national nursing strategy has been developed to enhance collaborative, rigorous scientific enquiry that builds a significant body of knowledge in order to improve the health of the people of South Africa. It is envisaged that the research strategy will contribute significantly to directing future nursing research development in South Africa. It is evident in this lecture that the use of technology in nursing has truly evolved and can be seen as a major driver of changes in the nursing profession. There are huge shifts in how patient records are maintained, how medications are tracked and ordered, how care is passed from one provider to another, how blood and X-ray results are retrieved and how information is being accessed at the point of care in nursing. In today’s healthcare system technology is the foundation of the future. Today’s nurses must not only know how to care for patients, but how to use technology safely and appropriately in their day-to-day work. It is evident that nursing has transformed in many ways since 1970 and that nurses have always been the drivers of nursing transformation.
- Full Text:
Arsenic in the boardroom: strategies to deal with toxic leaders
- Authors: Mey, Michelle
- Subjects: Bullying in the workplace , Psychology, Industrial
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20945 , vital:29421
- Description: Effective leaders are critical in building successful organisations, communities and nations. Whilst academia and business alike advocate positive organisational psychology and the development of positive leadership, the sad reality is that there is a growing global prevalence of toxic leadership, with research indicating that between 20% and 60% of leaders may be defined as toxic (Veldsman, 2016). While toxic leaders, who initially come across as charming, confident and persuasive, may be effective in achieving organisational objectives in the short term, the long-term consequences can be devastating to the organisational brand and reputation, as well as to the morale and psyche of its members. Even though toxic leaders and bullies are becoming increasingly prevalent in organisations there is a lack of empirical research on workplace bullying.
- Full Text:
- Authors: Mey, Michelle
- Subjects: Bullying in the workplace , Psychology, Industrial
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20945 , vital:29421
- Description: Effective leaders are critical in building successful organisations, communities and nations. Whilst academia and business alike advocate positive organisational psychology and the development of positive leadership, the sad reality is that there is a growing global prevalence of toxic leadership, with research indicating that between 20% and 60% of leaders may be defined as toxic (Veldsman, 2016). While toxic leaders, who initially come across as charming, confident and persuasive, may be effective in achieving organisational objectives in the short term, the long-term consequences can be devastating to the organisational brand and reputation, as well as to the morale and psyche of its members. Even though toxic leaders and bullies are becoming increasingly prevalent in organisations there is a lack of empirical research on workplace bullying.
- Full Text:
Cinnamoyl-Oxaborole Amides: Synthesis and Their in Vitro Biological Activity.
- Gumbo, Maureen, Beteck, Richard M, Mandizvo, Tawanda, Seldon, Ronnett, Warner, Digby F, Hoppe, Heinrich C, Isaacs, Michelle, Laming, Dustin, Tam, Christina C, Cheng, Luisa W, Liu, Nicole, Land, Kirkwood, Khanye, Setshaba D
- Authors: Gumbo, Maureen , Beteck, Richard M , Mandizvo, Tawanda , Seldon, Ronnett , Warner, Digby F , Hoppe, Heinrich C , Isaacs, Michelle , Laming, Dustin , Tam, Christina C , Cheng, Luisa W , Liu, Nicole , Land, Kirkwood , Khanye, Setshaba D
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/122879 , vital:35362 , https://doi.org/10.3390/molecules23082038
- Description: Due to the increased interest in their application in the treatment of infectious diseases, boron-containing compounds have received a significant coverage in the literature. Herein, a small set of novel cinnamoly-oxaborole amides were synthesized and screened against nagana Trypanosoma brucei brucei for antitrypanosomal activity. Compound 5g emerged as a new hit with an in vitro IC50 value of 0.086 μM against T. b. brucei without obvious inhibitory activity against HeLa cell lines. The same series was also screened against other human pathogens, including Mycobacterium tuberculosis, the causative agent of tuberculosis (TB), for which moderate to weak activity (10 to >125 μM) was observed. Similarly, these compounds exhibited moderate activity against the human protozoal pathogen Trichomonas vaginalis with no observed effect on common microbiome bacterial species. The cross-species inhibitory activity presents the possibility of these compounds serving as broad-spectrum antibiotics for these prevalent three human pathogens.
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- Authors: Gumbo, Maureen , Beteck, Richard M , Mandizvo, Tawanda , Seldon, Ronnett , Warner, Digby F , Hoppe, Heinrich C , Isaacs, Michelle , Laming, Dustin , Tam, Christina C , Cheng, Luisa W , Liu, Nicole , Land, Kirkwood , Khanye, Setshaba D
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/122879 , vital:35362 , https://doi.org/10.3390/molecules23082038
- Description: Due to the increased interest in their application in the treatment of infectious diseases, boron-containing compounds have received a significant coverage in the literature. Herein, a small set of novel cinnamoly-oxaborole amides were synthesized and screened against nagana Trypanosoma brucei brucei for antitrypanosomal activity. Compound 5g emerged as a new hit with an in vitro IC50 value of 0.086 μM against T. b. brucei without obvious inhibitory activity against HeLa cell lines. The same series was also screened against other human pathogens, including Mycobacterium tuberculosis, the causative agent of tuberculosis (TB), for which moderate to weak activity (10 to >125 μM) was observed. Similarly, these compounds exhibited moderate activity against the human protozoal pathogen Trichomonas vaginalis with no observed effect on common microbiome bacterial species. The cross-species inhibitory activity presents the possibility of these compounds serving as broad-spectrum antibiotics for these prevalent three human pathogens.
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Happiness: a business model
- Authors: Cullen, Margaret
- Subjects: Happiness , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20956 , vital:29422
- Description: The concept of happiness might appear elusive. It has been extensively analysed by philosophers and historians, who agree that the concept of happiness in antiquity centered on good luck and fortune. Something beyond human agency and therefore controlled by the Gods (McMahon, 2006).Today, happiness is viewed as something over which you can have control and something that can be pursued (Oishi, 2012).
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- Authors: Cullen, Margaret
- Subjects: Happiness , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20956 , vital:29422
- Description: The concept of happiness might appear elusive. It has been extensively analysed by philosophers and historians, who agree that the concept of happiness in antiquity centered on good luck and fortune. Something beyond human agency and therefore controlled by the Gods (McMahon, 2006).Today, happiness is viewed as something over which you can have control and something that can be pursued (Oishi, 2012).
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Novobiocin–ferrocene conjugates possessing anticancer and antiplasmodial activity independent of HSP90 inhibition.
- Mbaba, Mziyanda, de la Mare, Jo-Anne, Sterrenberg, Jason N, Kajewole, Deborah, Maharaj, Shantal, Edkins, Adrienne L, Isaacs, Michelle, Hoppe, Heinrich C, Khanye, Setshaba D
- Authors: Mbaba, Mziyanda , de la Mare, Jo-Anne , Sterrenberg, Jason N , Kajewole, Deborah , Maharaj, Shantal , Edkins, Adrienne L , Isaacs, Michelle , Hoppe, Heinrich C , Khanye, Setshaba D
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/122858 , vital:35359 , https://doi.org/10.1007/s00775-018-1634-9
- Description: A series of tailored novobiocin–ferrocene conjugates was prepared in moderate yields and investigated for in vitro anticancer and antiplasmodial activity against the MDA-MB-231 breast cancer line and Plasmodium falciparum 3D7 strain, respectively. While the target compounds displayed moderate anticancer activity against the breast cancer cell line with IC50 values in the mid-micromolar range, compounds 10a–c displayed promising antiplasmodial activity as low as 0.889 µM. Furthermore, the most promising compounds were tested for inhibitory effects against a postulated target, heat shock protein 90 (Hsp90).
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- Authors: Mbaba, Mziyanda , de la Mare, Jo-Anne , Sterrenberg, Jason N , Kajewole, Deborah , Maharaj, Shantal , Edkins, Adrienne L , Isaacs, Michelle , Hoppe, Heinrich C , Khanye, Setshaba D
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/122858 , vital:35359 , https://doi.org/10.1007/s00775-018-1634-9
- Description: A series of tailored novobiocin–ferrocene conjugates was prepared in moderate yields and investigated for in vitro anticancer and antiplasmodial activity against the MDA-MB-231 breast cancer line and Plasmodium falciparum 3D7 strain, respectively. While the target compounds displayed moderate anticancer activity against the breast cancer cell line with IC50 values in the mid-micromolar range, compounds 10a–c displayed promising antiplasmodial activity as low as 0.889 µM. Furthermore, the most promising compounds were tested for inhibitory effects against a postulated target, heat shock protein 90 (Hsp90).
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The Plastic University: Knowledge, Disciplines and Decolonial 'Circulations'
- Authors: Keet, Andre
- Subjects: Critical pedagogy , Transformative learning , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/21077 , vital:29436
- Description: The university is as plastic as the social figure of ‘Mandela’ after whom it is named. It is as plastic as the globe and its humanity in whose name it exists. And, it is as plastic as the human subject that is ‘perpetually called on to reconfigure itself in relation to the artefacts of the age’, as Mbembe2 argues in Critique of Black Reason. The very nature of addressing, of writing … of inaugurating … oneself, through an address is an act of reconfiguration, of responding to an artefact of the university and the professoriate. It is, when all is said and done, a performance, a performative act: declaring so and so a professor of this or that status, authorizing ‘it’ to utter something with some kind of formative force.
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- Authors: Keet, Andre
- Subjects: Critical pedagogy , Transformative learning , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/21077 , vital:29436
- Description: The university is as plastic as the social figure of ‘Mandela’ after whom it is named. It is as plastic as the globe and its humanity in whose name it exists. And, it is as plastic as the human subject that is ‘perpetually called on to reconfigure itself in relation to the artefacts of the age’, as Mbembe2 argues in Critique of Black Reason. The very nature of addressing, of writing … of inaugurating … oneself, through an address is an act of reconfiguration, of responding to an artefact of the university and the professoriate. It is, when all is said and done, a performance, a performative act: declaring so and so a professor of this or that status, authorizing ‘it’ to utter something with some kind of formative force.
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