Solid-phase extraction based sample preparation for the determination of drug and organic pollutant residue
- Authors: Pule, Bellah Oreeditse
- Date: 2011 , 2011-02-08
- Subjects: Food contamination , Drugs -- Analysis , Pharmaceutical chemistry , Extraction (Chemistry) , Sorbents
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4406 , http://hdl.handle.net/10962/d1006711 , Food contamination , Drugs -- Analysis , Pharmaceutical chemistry , Extraction (Chemistry) , Sorbents
- Description: This thesis presents solid phase extraction (SPE) methodologies based on mixed-mode polymeric sorbents; a mixed mode strong anion exchanger (Agilent SampliQ SAX) and a mixed mode strong cation exchanger (Agilent SampliQ SCX). Furthermore, dispersive-SPE based on a quick, easy, cheap, effective, rugged and safe (QuEChERS) method was assessed for applicability in the determination of drug residues. The mixed-mode polymeric sorbents were evaluated for the simultaneous fractionation of drugs that exhibit diverse polarities with acidic, basic and neutral functionalities in biological matrices (plasma and urine). The polymeric skeleton of these sorbents entails an exchanger group and therefore provides two retention mechanisms, strong cation or anion exchange retention mechanisms with hydrophobic interactions. It was demonstrated that with a sequential elution protocol for sample clean-up analytes were fractionated into acidic, basic and neutral classes. The SAX was employed for analysis of ketoprofen, naproxen (acidic drugs), nortriptyline (basic) and secobarbital (neutral) from urine sample. The SCX was used for fractionating phenobarbital, p-toluamide (acidic), amphetamine, m-toluidine (basic) and acetaminophen (neutral drug) from plasma sample. QuEChERS method was employed for quantitative determination of 16 polycyclic aromatic hydrocarbons (PAHs) from fish fillets and soil; 9 sulfonamides (SAs) from chicken muscles and acrylamide (AA) in cooking oil. The analyte recoveries ranged from 79.6 - 109% with RSDs ranging from 0.06 - 1.9% at three different fortification levels. Good linearity (r2 > 0.9990) was attained for most analytes. The limits of detection and quantification ranged from 0.03 - 0.84 μg/ml and 0.81 - 1.89 μg/ml respectively for analytes in biological samples. LODs and LOQs for analytes in food and environmental samples ranged from 0.02 to 0.39 and 0.25 to 1.30 ng/g respectively.
- Full Text:
- Date Issued: 2011
A perspective on the question of the absence or presence of religious beliefs relating to elements of modern artistic endeavour, with special reference to the life and work of Francis Bacon
- Authors: Mullins, Nigel Lorraine Griffin
- Date: 1994
- Subjects: Bacon, Francis, 1909-1992 -- Criticism and interpretation Art and religion
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2460 , http://hdl.handle.net/10962/d1007710
- Description: Preface: An awareness of certain contradictory perceptions and assumptions regarding religious beliefs today and their relevance to art prompted a question which led to the research undertaken in this minithesis. The question was: how significant is the absence or presence of religious beliefs to the modern creative process? The writings of some theologians, sociologists, psychologists, and anthropologists seem to indicate that religious beliefs are fundamental to the functioning of society and the individuals who are part of it. Furthermore, even a cursory study of the history of art will demonstrate the strong bond between pre-nineteenth century image making and organised religion. Today, however, this relationship appears uncertain or even non-cxistant. This is a result of processes which began to gain strength in the nineteenth century: these include the industrial revolution, scientism and materialism. Peter Fuller, stated that among the most central questions affecting art is, "the severance of the arts from religious tradition and their existence within an increasingly secular culture." (Fuller, 1990, p. 189). This statement appears to bring the issues together very neatly. Firstly there is the assertion that religion has nourished and been a vital force behind art through the ages, and that, modern art has lost this source of vitality. Secondly, there is the contention tbat society, since the nineteenth century, has become increasingly secular, and that this has had (and is having) a radical effect on modern art. That art has been divorced from religion and that religion is disappearing, or will do so, is the logical conclusion, according to theorists who insist on institutional religion as the only true form. Some artists, for whom the absence or presence or loss of religious beliefs are important issues, may in this situation experience a creative crisis. In order to address these issues it was necessary to investigate whether religious beliefs are important to artistic endeavour and, if so, what the consequences of the absence of beliefs might be. For this reason, research into the nature of religion and the modem religious situation was initiated. The purpose of the extensive discussion on the nature of religion was to establish definitions of, or a view of, religion which could provide a sound basis for this investigation of the issues that have been outlined. In order to demonstrate whether religious beliefs are important to the creative process, Francis Bacon was chosen for discussion because he appeared to be a modern artist who had no religious beliefs and was thus an ideal example by which the consequences of this could be gauged.
- Full Text:
- Date Issued: 1994
Electrospun fiber based colorimetric probes for aspartate aminotransferase and I7ß-estradiol
- Authors: Pule, Bellah Oreeditse
- Date: 2014
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/54869 , vital:26623
- Description: Fabrication, characterization and application of electrospun polymer composite based colorimetric probes are presented in this thesis. The first part of the thesis involved the development of a protocol for in situ reduction of gold trication (Au³+) into metallic gold atoms with sodium borohydride. The prepared PS-Au NPs showed an SPR band at 542 nm. Furthermore the absorbance of the colloidal Au NPs in polystyrene exhibited a good linear correlation (r2 = 0.9934) to E2 concentration in the range 5 to 50 ppb. The lowest naked eye detection limit was found to be 0.5 ppb and could further be easily monitored by UV-vis spectrophotometer. Upon interaction with E2 Au NPs aggregated to give nanoparticle clusters, confirmed through TEM analysis. Different concentrations of Au NPs were found to have a significant effect on the conductivity of the PS-Au NPs solution. At low concentrations of Au NPs (0.002, 0.015 and 0.025% w/v) PS-Au NPs solution could be electrospun without clogging. The FE-SEM images showed a non-beaded morphology of PS-Au NPs composite fibers. Upon interaction of the colorimetric probe strips with various E2 concentrations it was observed that with increasing E2 concentrations (50 ng/ml to 1000 µg/ml) the colour of the probe changed gradually from white to shades of pink and eventually to shades of blue at higher E2 concentrations. The visible cut-off concentration was 100 ng/ml. The second component of the thesis focussed on the development of diazonium dye-nylon 6 colorimetric probe for aspartate aminotransferase. At optimal pH 7.4 the enzyme was stable, highly active and catalyzed a reaction that was susceptible to detailed kinetic analysis by continuous optical methods. The KM values for L-aspartate, a- ketoglutarate and oxaloacetate were 2.60, 0.59 and 0.066 mM, respectively. On the basis of these KM values the solid-state colorimetric probe was developed. A colour change occurred when an electrospun dye-N 6 probes were exposed to visibly detectable concentrations of oxaloacetate, an AST-catalyzed reaction product. While monitoring AST activity at 530 run, a linear relation was obtained between oxaloacetate concentrations ranging from 0.4 - 7.4 µg/ml. Naked eye detection limit of 2.4 µg/ml oxalaoacetate equivalence of 10 times the normal AST activity was attained. The colorimetric probe was in addition, tested against co-substrates aspartate, ketoglutarate and a variety of other compounds such as alanine, pryruvate, as well as glutamic, malaic and succinic acids known to interfere with AST activity. Each compound elicited a distinct and unambiguous colour change upon interaction with the colorimetric probe. Further X-ray powder diffraction (XRD), duNouy ring tensiometer, Brunauer- Emmett- Teller (BET) and energy dispersive X-ray spectroscopy (EDS/EDX) characterization confirmed composition and stability of the colorimetric probes. Colorimetric probes developed in this thesis are relatively cost effective, simple and "rugged" for measurement of analytes with visual detection without sample pretreatment in matrices, such as plasma and dairy effluents. The probes warrant further investigation as they have shown potential and offer a promising solid-state platform for both clinical diagnostics and environmental monitoring.
- Full Text:
- Date Issued: 2014
Rhodes University Graduation Ceremony 2014
- Authors: Rhodes University
- Date: 2014
- Language: English
- Type: text
- Identifier: vital:8148 , http://hdl.handle.net/10962/d1009493
- Description: Rhodes University Graduation Ceremonies [at] 1820 Settlers National Monument Thursday, 10 April at 10.00 & 17:00 [and] Friday, 11 April at 10:00; 14:30 & 18:00 [and] Saturday, 12 April at 10:00 , Rhodes University Awards, Scholarships,Bursaries and Prizes 2014
- Full Text:
- Date Issued: 2014
Rhodes University Graduation Ceremony 1995
- Authors: Rhodes University
- Date: 1995
- Language: English
- Type: text
- Identifier: vital:8129 , http://hdl.handle.net/10962/d1006754
- Description: Rhodes University Graduation Ceremonies Thursday, 20 April 1995 at 8:15 p.m. [and] Friday, 21 April 1995 at 10:30 a.m. [and] 08:15 p.m. [and] Saturday, 22 April 1995 at 10:30 a.m. in the 1820 Settlers National Monument. , Rhodes University East London Graduation Ceremony Saturday, 13 May 1995 at 11.00 a.m. in the Guild Theatre.
- Full Text:
- Date Issued: 1995
Zadoyo pule badialo fulo
- Authors: Iyenga Francois and friend Eleo , Hugh Tracey
- Date: 1952
- Subjects: Folk songs, Zande , Folk music , Field recordings , Africa, Sub-Saharan , Africa Democratic Republic of Congo Bondo f-cg
- Language: Zande/Bandiya
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/167431 , vital:41479 , International Library of African Music, Rhodes University, Grahamstown, South Africa , TR0122-12
- Description: The Zande are a Sudanic people and are found along the north eastern border of the Congo and Southern Sudan. They are an active military tribe with great influence and power in the whole of this area, their young men being noted for their bravery. This tune set to a topical song is in the common Zande dance measure and a Zande audience hearing it would be likely to start their attractive dance action in spite of the accompanying instrument being a Likembe and not a xylophone which is commonly used for dancing on account of its greater volume of sound. The player tuned up his instrument begining with the tone centre 440 vs. The order of notes from left to right was:- 880, 648, 488, 360, 244, 220, 180, 324, 440, 584, 720, 292 vs. Topical song with 2 Ekembe, 12 note Likembe Mbiras.
- Full Text: false
- Date Issued: 1952
The relationship between work engagement and psychological meaningfulness
- Authors: Faro, Gillian Rochelle
- Date: 2021-04
- Subjects: Employee motivation , Organizational behavior , Psychology, Industrial
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51360 , vital:43267
- Description: Work engagement is a positive psychological construct that according to research predicts positive organisational outcomes. The overarching objective of this study is to investigate the relationship between work engagement and psychological meaningfulness and to determine whether work engagement can be predicted by means of psychological meaningfulness. This study took on the form of a cross-sectional design, using a questionnaire to measure work engagement and psychological meaningfulness. The Utrecht Work Engagement Scale (UWES) and the Psychological Meaningfulness Scale (PMS) are instruments that have been widely used in research and were both found to be reliable and valid. The questionnaire was administered in the form of a paper and pencil self-administered questionnaire. This study was conducted at a mining/manufacturing company based in the Eastern Cape for employees across all occupational levels (N=202) and the sample was selected using non-probability convenience sampling as participation in the study was voluntary. Descriptive statistic methods were used to analyse the data, as well as an analysis of variance (ANOVA). Correlation data analysis methods were utilised to measure the relationship between variables. The study found a strong positive relationship between work engagement and psychological meaningfulness and that a large portion of the respondents scored moderate to high on work engagement and high on psychological meaningfulness. The study also found that there is a positive relationship between work engagement and age in that older employees are more engaged than younger employees. Male respondents were found to have higher levels of psychological meaningfulness. Lastly, the study revealed that psychological meaningfulness predicts work engagement. Research and organisational recommendations based on the research are discussed. , Thesis (MA) -- Faculty of Business and Economic Sciences, Labour Relations and Human Resources, 2021
- Full Text:
- Date Issued: 2021-04
Rhodes University Research Report 2014
- Authors: Rhodes University , Roberts, Jaine , Gillitt, Tarryn , Mantolo, Thumeka , Macgregor, Jill , Dore, Sally
- Date: 2014
- Language: English
- Type: Text
- Identifier: http://hdl.handle.net/10962/59309 , vital:27547
- Description: From Foreword by Dr Sizwe Mabizela: In the year under review, individual academics continued to receive widespread recognition for their work. Particularly noteworthy were the accolades that Distinguished Professor Tebello Nyokong continued to attract. In 2014 she was chosen as one of South Africa’s 21 Icons. Professor Nyokong was also appointed by United Nations Secretary- General Ban Ki-Moon to the High-Level Panel on Technology Bank For Least Developed Countries. Money cannot buy the kind of positive profile that Professor Nyokong brings to Rhodes. Professor Janice Limson was awarded the DST/NRF SARChI Chair in Science Communication. This brought to 11 the number of SARChI Chairs awarded to Rhodes University. Professor Heila Lotz-Sisitka was appointed as the inaugural Director of the new Postgraduate Studies Centre, to lead and manage the provision of additional support for enhancing the quality, quantity, and equity of our Postgraduate population. , A publication of the Rhodes University Research Office, compiled and edited by Jaine Roberts, Tarryn Gillitt, Thumeka Mantolo, Patricia Jacob and Jill Macgregor. Design and Layout: Sally Dore
- Full Text:
- Date Issued: 2014
Rhodes University Graduation Ceremony 2011
- Authors: Rhodes University
- Date: 2011
- Language: English
- Type: text
- Identifier: vital:8136 , http://hdl.handle.net/10962/d1007246
- Description: Rhodes University Graduation Ceremonies [at] 1820 Settlers National Monument Thursday, 7 April at 18.00 [and] Friday, 8 April at 10:30; 14:30 & 18:00 [and] Saturday, 9 April at 10:30
- Full Text:
- Date Issued: 2011
South Africa's "Rainbow People", national pride and happiness
- Authors: Moller, Valerie , Dickow, H , Harris, M
- Date: 1999
- Language: English
- Type: Article
- Identifier: vital:7117 , http://hdl.handle.net/10962/d1010751
- Description: Since the first free elections were held in April 1994, South Africans are popularly known as the ''rainbow people''. The paper inquires whether South Africans who experienced pride in their nation in the first years of democracy also perceived a greater sense of subjective well-being. It is proposed that national pride in post-apartheid South Africa might be fused with or work through self-esteem to lift levels of happiness. The paper traces the history of the new integrating civil religion of the rainbow people and the acceptance of the rainbow as a political symbol of unity among the diverse people of South Africa immediately after the 1994 elections and two years later. The proposed link between national pride and happiness was explored with data from two independent national surveys, the 1995 South African World Values Survey conducted by Markinor and a June 1996 MarkData syndicated omnibus survey. The study found that the appeal of the rainbow as political symbol was inclusive of all groups in society and that feelings of national pride and support for the rainbow ideal were positively associated with subjective well-being. As indicated by intensity and frequency measures, the majority of South Africans were proud of their country and could name a national achievement that inspired pride. Better-off South Africans tended to be happier and more satisfied with life but less proud, while the poor were less happy but fiercely proud of their country. Results suggest that belief in South Africa’s ''rainbow nation'' ideal may have assisted in boosting happiness during the transition to a stable democracy, thereby preventing alienation among the losers under the new political dispensation. Supporters of the ideal of the rainbow nation were more optimistic than others about the future of their country.
- Full Text:
- Date Issued: 1999
A study of electrospun nanofibers and diatomaceous earth materials for the extraction of alkaloids, flavonoids and aromatic amines in various matrices
- Authors: Mothibedi, Kediemetse (Kedimetse)
- Date: 2013 , 2013-04-07
- Subjects: Nanofibers , Electrospinning , Sorbents , Extraction (Chemistry) , Alkaloids , Flavonoids , Amines , Matrices , Goldenseal , Ginkgo , Dyes and dyeing -- Chemistry
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4288 , http://hdl.handle.net/10962/d1003052 , Nanofibers , Electrospinning , Sorbents , Extraction (Chemistry) , Alkaloids , Flavonoids , Amines , Matrices , Goldenseal , Ginkgo , Dyes and dyeing -- Chemistry
- Description: The thesis explored the use of different sorbent materials in solid phase extraction method development. The methods included the use of the polymeric Agilent Bond Elut Plexa solid phase extraction and electrospun polymer-silica composite sorbents for clean-up and preconcentration. Sample clean-up for alkaloids (hydrastine and berberine) in goldenseal, Hydrastis canadensis and flavonoids (quercetin, kaempferol and isorhamnetin) in Ginkgo biloba was achieved using Bond Elut Plexa SPE sorbent. Clean-up of flavonoids in Ginkgo biloba was also achieved using electrospun polymer-silica composite (polystyrene-silica, polyacrylonitrile-silica and nylon 6-silica) sorbents. All analysis of flavonoids and alkaloids was carried out using an Agilent 1200 Series HPLC coupled with a diode array detector. Good peak separation was achieved in less than 6 min employing an Agilent ZORBAX Eclipse Plus C18 column (4.6 x 75 mm, 3.5 μm) at 35⁰C. The mobile phases employed were 0.1% phosphoric acid/methanol gradient and 0.5% phosphoric acid/methanol (40:60) for alkaloids and flavonoids respectively. The calibration curves exhibited linearity up to 120 μg mL⁻¹ with correlation coefficients of more than 0.9980. The recoveries ranged from 73-109% with relative standard deviation of less than 5% for all analytes. Agilent Chem Elut supported liquid extraction was employed for the development of a sample preparation method for the determination of 24 banned aromatic amines from azo dyes in textile following the EU standard method EN 14362-1:2003 (E) and the Chinese standard method GB/T 17592-2006. The supported liquid extraction was effective in the extraction of the aromatic amines from textile (cotton, wool and polyester/cotton [80%:20%]). Most of the recoveries obtained were conforming to the minimum requirements set in the EN 14362-1:2003 (E) standard method and the relative standard deviations were less than 15%. Good peak separation was obtained within 70 min run time using the Agilent Zorbax SB-Phenyl column (4.6 mm x 250 mm, 5-micron) or the Agilent DB-35 MS (J & W) (30 m x 0.25 mm, 0.25 μm film thickness. It was demonstrated that the polymeric Agilent Bond Elut Plexa, electrospun nanofibers and diatomaceous earth were effective in extraction of alkaloids, flavonoids and aromatic amines in different matrices. The developed methods were simple, rapid and reproducible.
- Full Text:
- Date Issued: 2013
Pre-concentration of heavy metals in aqueous environments using electrospun polymer nanofiber sorbents
- Authors: Darko, Godfred
- Date: 2012
- Subjects: Heavy metals -- Absorption and adsorption -- Research Nanochemistry -- Research Polystyrene -- Research Polyamides -- Research
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4337 , http://hdl.handle.net/10962/d1004998
- Description: This thesis presents an alternative approach for pre-concentrating heavy metals in aqueous environments using electro spun polymer nanofiber sorbents. The conditions for electrospinning polyethersulfone, polystyrene, polysulfone and polyamide-6 were optimized. The morphologies and porosities of the electrospun nanofibers were studied using SEM and BET nitrogen gas adsorptions. The nanofibers had mesoporous morphologies with specific surface areas up to 58 m2/g. The electro spun nanofiber sorbents were characterized in terms of their tunability for both uptake and release of heavy metals. The usability of the sorbent was also assessed. The sorbents showed fast adsorption kinetics for heavy metals « 20 min for As, Cu, Ni and Pb) in different aqueous environments. The adsorption characteristics of the sorbents best fitted the Freundlich isotherm and followed the first order kinetics. The efficiencies of adsorption and desorption of heavy metals on both imidazolyl-functionalized polystyrene and amino-functionalized polysulfone sorbents were more than 95% up to the fifth cycle of usage. Reusability improved dramatically (up to 10 runs of usage) when mechanically stable amino-functionalized nylon-6 electro spun nanofibers were used. The capacity of the amino-functionalized nylon-6 sorbent to pre-concentrate heavy metals compared very favourably with those of aqua regia and HN03+H202 digestions especially in less complex matrices. Due to their highly porous nature, the electro spun nanofibers exhibited high adsorption capacities (up to 50 mg/g) for heavy metal ions. The loading capacities achieved with the imidazolyl-functionalized sorbent were higher than those for amino-functionalized mesoporous silica and biomass-based sorbents. The electro spun nanofiber sorbents presents an efficient and cost effective alternative for preconcentrating heavy metals in aqueous environments.
- Full Text:
- Date Issued: 2012
The Jesus People : attitude, personal-orientation and life-style changes as a function of non-conformist religious influence
- Authors: Stones, Christopher R
- Date: 1976
- Subjects: Jesus People -- South Africa -- Johannesburg -- Hillbrow -- Attitudes , Youth -- South Africa -- Johannesburg -- Hillbrow -- Religious life , Religious communities -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3242 , http://hdl.handle.net/10962/d1013312
- Description: The Jesus People of Hillbrow, Johannesburg, assert that since joining the Jesus movement they have undergone radical changes; from a life of turmoil to a life of relative serenity. Such claims, if valid, have implications for the counter-culture, which is comprised largely of youth alienated from mainstream society and church. The present study then, was an investigation to determine whether the members of the Jesus movement have changed and if so, attempts were made to delineate such changes. The Jesus People investigated were members of the "Invisible Church", who had been residing communally for a period of not less than three months. A battery of questionnaires was administered on two occasions. The first occasion required the subjects to complete the questionnaires as they would have prior to their conversion, while the second administration required that the subjects complete the questionnaires according to their attitudes, values and opinions presently held. To counter any practice effects, the requirements for completion of the questionnaires were reversed for one half of the group randomly chosen. The order of presentation of the questionnaires was kept the same to counter any fatigue-effects. (The control group being matched with the experimental group should experience the same degree of fatigue.) The individuals selected for the control group were recruited from established-church youth clubs. These individuals were matched with the members of the Jesus movement for age, sex, home-language, general intelligence and occupation of father. The procedure of questionnaire administration for the control group was identical to that adopted for the experimental group. Both the experimental and the control group comprised 22 individuals. Incidental to the major design of the present study was the generation of a small (eight) group of Pentecostals, the results of which were analysed separately from those of the experimental and control groups. The finding that this group underwent the least change did not support the a priori expectation that Pentecostals should show changes which are intermediate to those of the experimental and control groups. It is argued however, that this Pentecostal group is not representative of Pentecostals per se. Bearing in mind, that the answers received depend, to a large extent, on the nature of the questions posed, the Jesus People, as a function of conversion (operationally defined as a "Jesus Experience"), underwent significant increases in their degree of perceived security but revealed significant decreases on attributes related to self-actualization. In addition, their predominant life-style orientation changed from personalistic to sociocentric, and there was an increased support for biblicistic fundamentalism. Associated with the above changes were decreases on the majority of the Wilson conservatism-scale dimensions, together with changes on a questionnaire explicitly developed for the present study. It is argued that the changes undergone by the members of the Jesus movement are in a positive direction, the "Invisible Church" serving as a 'half-way house'. Such changes are posited to be a function of an operationally defined "Jesus Experience"; a psycho-sociological experience rather than a theological, ecclesiastical experience.
- Full Text:
- Date Issued: 1976
Agreement and coordination in XiTsonga, SeSotho and IsiXhosa: an optimality theoretic perspective
- Authors: Mitchley, Hazel
- Date: 2016
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/3423 , vital:20491
- Description: This thesis provides a unified Optimality Theoretic analysis of subject-verb agreement with coordinated preverbal subjects in three Southern Bantu languages: Xitsonga (S53), Sesotho (S33), and isiXhosa (S41). This analysis is then used to formulate a typology of agreement resolution strategies and the contexts which trigger them. Although some accounts in the Bantu literature suggest that agreement with coordinate structures is avoided by speakers (e.g. Schadeberg 1992, Voeltz 1971) especially when conjuncts are from different noun classes, I show that there is ample evidence to the contrary, and that the subject marker used is dependent on several factors, including (i) the [-HUMAN] specification on the conjuncts, (ii) whether the conjuncts are singular or plural, (iii) whether or not the conjuncts both carry the same noun class feature, and (iv) the order of the conjuncts. This thesis shows that there are various agreement resolution strategies which can beused: 1) agreement with the [+HUMAN] feature on the conjuncts, 2) agreement with the[-HUMAN] feature on the conjuncts, 3) agreement with the noun class feature on both conjuncts, 4) agreement with the noun class feature on the conjunct closest to the verb, and 5) agreement with the noun class feature on the conjunct furthest from the verb. Not all of these strategies are used by all languages, nor are these strategies interchangeable in the languages which do use them – instead, multiple factors conspire to trigger the use of a specific agreement strategy within a specific agreement featural context. I show that these effects can be captured using Optimality Theory (Prince and Smolensky 2004). The analysis makes use of seven constraints: RES#, MAX[+H], MAX[-H], DEP[-H], MAXNC, DEPNC, and AGREECLOSEST. The hierarchical ranking of these constraints not only accounts for the confinement of particular strategies to specific agreement featural contexts within a language, but also accounts for the cross-linguistic differences in the use of these strategies. I end off by examining the typological implications which follow from the OT analysis provided in this thesis.
- Full Text:
- Date Issued: 2016
An investigation of the interrelationship between group commitment, religiosity, marital adjustment and attitude to divorce in the Jewish ethnic group
- Authors: Miller, Bernice
- Date: 1991
- Subjects: Jews -- Psychology , Judaism , Jews -- Attitudes , Ethnicity , Marriage (Jewish law) , Divorce (Jewish law)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3019 , http://hdl.handle.net/10962/d1002528 , Jews -- Psychology , Judaism , Jews -- Attitudes , Ethnicity , Marriage (Jewish law) , Divorce (Jewish law)
- Description: The purpose of this research was to investigate the interrelationships between marital adjustment, group commitment, religiosity and attitude to divorce in the Jewish group. It amounted to a within group empirical study of the Jewish community of Cape Town. Research, to date, has focused on marital stability where researchers have found that Jews have lower divorce rates than the general population. The present study attempted to assess the psycho-social outcomes of group commitment in the form of marital adjustment, thus bridging the gap between marital quality and marital stability in the Jewish group. On a wider level, the purpose of this research was to assess whether a social structural framework, utilizing the concept of social integration, is a perspective that can be used in explaining variations in marital adjustment. The following were the findings of the research : Religiosity was correlated to group commitment but not to marital adjustment; group commitment was correlated to marital adjustment; a negative attitude to divorce was not correlated to marital adjustment, group commitment or religiosity.
- Full Text:
- Date Issued: 1991
Idolatry and the artist's role with special reference to the work and thought of Andy Warhol
- Authors: Waterkeyn, Linda Catherine
- Date: 1997
- Subjects: Warhol, Andy, 1928-1987 -- Criticism and interpretation
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2425 , http://hdl.handle.net/10962/d1002221
- Description: This thesis uses Hirsch's dual notion of intention, i. e. conscious, intentional meaning and symptomatic, unconscious meaning, in order to avoid a dead end in the critical assessment of Warhol's work. T.S. Eliot's term "objective correlative" refers to a phenomenon whereby "an inner emotional reality" is evoked by its "external equivalent". (Benet, 1965). Thus, given that no work of art is purely self-referential (as distinct from its being autonomous),Hirsch's notion allows that viewerreconstruction of a painting involves shared values and concerns; that a painting reconstructed by a viewer acquires the status of an icon through which the viewer participates in the artist's sacred cosmos. Sociology of art tends on the whole to extrapolate from actual works to the alleged conditions that gave rise to them. That it cannot predict what specific works will arise from given conditions makes it unscientific. However, its usefulness lies in its ability to reveal what values and concerns are shared by artist and viewer. This is vital for an interpretation of Warhol's work. Warhol's biography leads directly into the meaning of his work. The sickly child of an immigrant steelworker, he grew up in Pittsburgh - an epitome of the technocratic-industrial environment - and was exposed from an early age to a violent and ugly world where the disparity between the super-wealthy and the struggling workers was deeply disturbing. That Warhol himself became a multi-millionaire artistic tycoon is significant, for it means that his works, his icons, were participatory in the very cultural myths and neuroses they appear to display or even despise. That his work has meaning and is open to interpretation there is no doubt. For example, a man-made soup can, as a manifestation and containment of the sacred, is coercive. Here the sacred becomes familiar, affordable and disposable. An electric chair, a man-made instrument of death, gives man supremacy over mortality and the divine prerogative of purging the world of all evil. The essay, however, does not attempt to answer the broader questions raised by Fromm and Roszak about the spiritual emptiness of the twentieth century and the existential crises experienced by those who hunger for meaning and fasten greedily onto anything that seems to proffer a glimpse of something beyond. The essay, nevertheless, strives within this context to elucidate the valid in Warhol's work
- Full Text:
- Date Issued: 1997
Altruistic love culture and workers well-being: a study in workplace spirituality
- Authors: Simms, Michelle
- Date: 2019
- Subjects: Employee assistance programs -- South Africa , Religion in the workplace Altruism Interpersonal relations and culture -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/43468 , vital:36892
- Description: Business leaders and company analysts identify the fact that the marketplace necessitates flexibility and mobility to triumph over the competitive difficulties which businesses usually encounter. More recently approaches have focused on the role that people perform in bringing about competitive advantage and in particular strategies on how to increase Employee Well-being. Given the need for Employee Well-being in order to achieve desired work-related results, management has become progressively more enthusiastic about methods to improve the well-being of their employees. This research study seeks to make a contribution to this topic by investigating how Employee Well-being can be increased by inculcating an Altruistic Love culture amongst employees. To achieve this objective an Employee Well-Being Model was presented. Spiritual Leadership in the workplace was discussed as the theoretical framework with Altruistic Love as a feature in the intrinsic model of motivation explained further. Six values were defined and according to the theoretical framework were important in order to achieve Employee Well-being. These values were Appreciation, Kindness, Integrity, Compassion, Humility and Forgiveness. The Employee Well-Being Model served as a basis for the compilation of the survey questionnaire to investigate the role of Altruistic Love values in achieving Employee Well-being. The questionnaire was administered in two stages. The first was a printed survey distributed to all workers at a FMCG company called Springbok Discount Meat Centre. The second part was an electronic survey sent out by email, where a link to the online survey could be accessed. The empirical results revealed that Appreciation, Kindness, Integrity and Humility were significantly positively related to Employee Well-being. Compassion was significantly negatively related to Employee Well-being. It can consequently be postulated that there will be a significant improvement of Employee Well-Being in the workplace if Altruistic Love values, defined in the study as Appreciation, Kindness, Integrity and Humility are practised more often by employees including management.
- Full Text:
- Date Issued: 2019
Land, Church, Forced Removals and Community on Klipfontein Farm in the District of Alexandria, Eastern Cape c. 1872 - 1979
- Authors: Bezuidenhout, GJW
- Date: 2017
- Subjects: Janse van Rensburg family , Klipfontein Farm (Alexandria, South Africa) , Alexandria (South Africa) -- History , Colored people (South Africa) -- History , Colored people (South Africa) -- Religion , Colored people (South Africa) -- Relocation , Black people -- Relocation -- South Africa -- Eastern Cape , Family farms -- South Africa -- Eastern Cape , Church history -- South Africa -- Eastern Cape , Land tenure -- Law and legilstion -- South Africa , Land reform -- Law and legislation -- South Africa
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/161315 , vital:40615
- Description: This thesis is a case study of how church, land and dispossession of land has influenced identity formation of a coloured community in the Eastern Province, namely the Klipfontein community. Coloured history in the Eastern Province has largely been neglected. This study attempts to rectify such a lack of in-depth enquiry as it may lead to misinterpretations that may influence contemporary politics and identity formation. Through research based on primary sources, it is evident that the social landscape of Klipfontein Farm and the relationships between that community and surrounding black African and white communities have largely been shaped by the stipulations contained in the joint will of the community’s ancestors: Dirk and Sarah Janse van Rensburg. The land devolved into a trust and has been administered by trustees since the death of the first spouse in 1877. By keeping the land in a trust, it enabled the descendants to continue to live on the farm in perpetuity, without the risk of being forced off the land via financial restraints or racially-based legislation. But the usufructuaries could also never fully utilise Klipfontein as an agricultural concern due to a combination of a lack of equipment and skill, and the provisions of the will. These complications inevitably led to inter-familial disputes and tension. Before 1939 there had already been three court cases dealing with the interpretations of the Will. In that same year the Supreme Court ordered that tracts of the land, including a part of Boesmansriviermond village, be sold in order to pay off arrear rates and taxes. Although the responsibility for these sales lay with the trustees, the community has been suspicious of the usufructuaries ever since. A key element of the Klipfontein identity is their religion. The church legitimises their right to the farm - against those who wish to take that right away. Their claim to occupation is couched in scriptural discourse, viewing Klipfontein as 'their Garden of Eden' that God gave to the stamvader, Dirk Janse van Rensburg. This seemed to have been partially successful for the Klipfontein community in staving off harassment by authorities. It also caused friction between the community and the black African residents. Some usufructuaries and family members felt that such right was exclusively given to the coloured community and so they became increasingly annoyed by the black Africans who settled there. Other usufructuaries did not share this feeling. They allowed evicted black African farm labourers to settle on certain portions of Klipfontein until the late 1970s. The black African population rapidly increased due to misinformation and evictions from neighbouring farms. This only further exacerbated the inter-familial conflict between usufructuaries, flaring tensions between the black Africans and their reluctant hosts as well as animosity from the white community towards Klipfontein. In 1979, after a series of court cases, a decision was made to remove all the African settlers by force and relocate most of them to the ‘homeland’ of Ciskei. The rest, who were of ‘working-age’ were left behind in a ‘temporary emergency camp’ on the outskirts of Kenton-on-Sea. The effects of these removals still impact the relationships between the different racial groups in the area to this day.
- Full Text:
- Date Issued: 2017
Petrographic and geochemical characterisation of the hangingwall and the footwall rocks (the Dipeta and R.A.T. stratigraphic units) to the Kinsevere and Nambulwa copper ore deposits of the Lufilian Arc, southern Democratic Republic of Congo
- Authors: Nkulu, Robert Kankomba
- Date: 2020
- Subjects: Petrogenesis -- Congo (Democratic Republic) , Analytical geochemistry -- Congo (Democratic Republic) , Copper ores -- Congo (Democratic Republic) , Ore deposits -- Congo (Democratic Republic) , Katangan Sequence , Geological mapping -- Congo (Democratic Republic) , Central African Copperbelt (Congo and Zambia) , Lufilian Arc , Neoproterozoic Katangan R.A.T. (Roches Argilo Talqueuse) Subgroup , Dipeta Subgroup
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/142772 , vital:38115
- Description: The Kinsevere and Nambulwa copper deposits in the Democratic Republic of Congo (D.R.C.) are set in the eastern side of the Neoproterozoic Katanga Supergroup, forming the Lufilian Arc, resulting from a cratonic collision between the Congo and the Kalahari Cratons (ca.620-570_Ma). The Katanga Supergroup was deposited in an extensional rift setting with a sedimentary thickness succession ranging between 7 to 10 km, sub-divided into: − the Roan, the Nguba and the Kundelungu Groups. The stratigraphic column of the Roan Group consists of the R.A.T. (Roche Argilo Talqueuse), the Mines, the Dipeta and the Mwashya Subgroups. Three major deformation phases have been described characterised by complex multiphase tectonics related to a curved superposition of folded, thrust and sheared blocks. The rocks of the R.A.T., Mines and Dipeta Subgroups are recognised as blocks that occur within a stratiform to discordant and diapiritic megabreccia. The blocks were rafted upward with salt tectonics, resulting in the juxtaposition with the hangingwall and the footwall terranes. Therefore, in that context it has been found that the Dipeta may appear overlying the R.A.T. Subgroup through the unconformity decollement surface of heterogeneous breccia. The petrographic observations made of the R.A.T. and Dipeta samples indicates in both units the presence of detrital quartz and feldspar that have been altered and replaced by sericite and muscovite minerals. Gypsum is intimately associated with magnesite, showing an evaporitic environment domain, while magnesite is common as alteration phase both in the R.A.T. and Dipeta Subgroups. Pyrophyllite has been observed in the Dipeta, resulting from reaction of silica with the Kaolinite at low temperature. Accessory detrital minerals include zircon, as well as xenotime intergrown with altered Fe-Ti-oxide hematite, forming complex textures with disseminated Ti-oxides both in R.A.T. and Dipeta units. Major and trace element geochemistry indicates that the Dipeta is more dolomitic and magnesite while the R.A.T. is clay-rich. The Ti2O value of Dipeta and R.A.T samples is relatively low, ranging between 0.36 and 0.69 wt.% respectively, which suggest highly evolved felsic material in the protolith. This is consistent with interpretation based on the Al2O3/TiO2 ratio, which ranges between 18 and 23 for the R.A.T. and Dipeta respectively, indicating an intermediate to felsic granitoids as the protolith of R.A.T. and Dipeta siltstones. The Ti/Zr ratio of R.A.T. and Dipeta samples of less than 10, while, the higher La/Sc ratio of between 2.6 and 5.5 (for the R.A.T. and Dipeta respectively) indicate that both the R.A.T. and Dipeta are active continental and passive margin tectonic setting. Based on the geochemical variation with depth across the R.A.T. and Dipeta and their contact zone, a geochemical fingerprinting suggests that the ratio TiO2/Al2O3 appears to be useful and could be considered as a stratigraphic geochemical maker able to discriminate the R.A.T. and the Dipeta Subgroups during the geological mapping.
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- Date Issued: 2020
Synthesis and characterisation of lanthanide complexes with nitrogen- and oxygen-donor ligands
- Authors: Madanhire, Tatenda
- Date: 2016
- Subjects: Rare earth metals
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/13127 , vital:27154
- Description: The reactions of Ln(NO3)3∙6H2O (Ln = Pr, Nd or Er) with the potentially tridentate O,N,O chelating ligand 2,6-pyridinedimethanol (H2pydm) were investigated, and complexes with the formula, [Ln(H2pydm)2(NO3)2](NO3) (Ln = Pr or Nd) and [Er(H2pydm)3](NO3)3 were isolated. The ten-coordinate Pr(III) and Nd(III) compounds crystallise in the triclinic space group P-1 while the nine-coordinate Er(III) complex crystallises in the monoclinic system (P21/n). The reaction of PrCl3∙6H2O with H2pydm yielded the compound, [Pr(H2pydm)3](Cl)3, that crystallises in the monoclinic system, space group P21/c with α = 90, β = 98.680(1) and γ = 90°. The nine-coordinate Pr(III) ion is bound to three H2pydm ligands, with bond distances Pr-O 2.455(2)-2.478(2) Å and Pr-N 2.6355(19)-2.64(2) Å. X-ray crystal structures of all the H2pydm complexes reveal that the ligand coordinates tridentately, via the pyridyl nitrogen atom and the two hydroxyl oxygen atoms. The electronic absorption spectra of complexes show 4f-4f transitions. Rare-earth complexes, [Ln(H2L1)2(NO3)3] [Ln = Gd, Ho or Nd], were also prepared from a Schiff base. The X-ray single-crystal diffraction studies and SHAPE analyses of the Gd(III) and Ho(III) complexes shows that the complexes are ten-coordinate and exhibit distorted tetradecahedron geometries. With proton migration occurring from the phenol group to the imine function, complexation of the lanthanides to the ligand gives the ligand a zwitterionic phenoxo-iminium form. A phenolate oxygen-bridged dinuclear complex, [Ce2(H2L1)(ovan)3(NO3)3], has been obtained by reacting Ce(NO3)3∙6H2O with an o-vanillin derived Schiff base ligand, 2-((E)-(1-hydroxy-2-methylpropan-2-ylimino)methyl)-6-methoxyphenol (H2L1). Hydrolysis of the Schiff base occurred to yield o-vanillin, which bridged two cerium atoms with the Ce∙∙∙Ce distance equal to 3.823 Å. The Ce(III) ions are both tencoordinate, but have different coordination environments, showing tetradecahedron and staggered dodecahedron geometries, respectively. The reaction of salicylaldehyde-N(4)-diethylthiosemicarbazone (H2L2) in the presence of hydrated Ln(III) nitrates led to the isolation of two novel compounds: (E)-2[(ortho-hydroxy)benzylidene]-2-(thiomethyl)-thionohydrazide (1) and bis[2,3-diaza4-(2-hydroxyphenyl)-1-thiomethyl-buta-1,3-diene]disulfide. The latter is a dimer of the former. For this asymmetric Schiff base, 1 and the symmetric disulfide, classical hydrogen bonds of the O–H∙∙∙N as well as N–H∙∙∙S (for 1) type are apparent next to C–H∙∙∙O contacts. 4-(4-Bromophenyl)-1-(propan-2-ylidene)thiosemicarbazide was also prepared upon reacting 4-(4-bromophenyl)-3-thiosemicarbazide with acetone in the presence of ethanol and La(NO3)3∙6H2O. The C=S bond length was found to be 1.6686(16) Å which is in good agreement with other thioketones whose metrical parameters have been deposited with the Cambridge Structural Database. Classical hydrogen bonds of the N–H∙∙∙N and the N–H∙∙∙Br type are observed next to C–H∙∙∙S contacts. All synthesised compounds were characterised by microanalyses, single-crystal X-ray diffraction (except for [Nd(H2L1)2(NO3)3]), 1H NMR and IR spectroscopy.
- Full Text:
- Date Issued: 2016