List of Titles

The crystal and molecular structure of the bis(4-N, N1-dimethylaminopyridine) solvate of disalicylicacidatobis(nitrotodioxouranium)(VI)

- Nassimbeni, L R, Rodgers, Allen L, Haigh, John M

Authors: Nassimbeni, L R , Rodgers, Allen L , Haigh, John M
Date: 1976
Language: English
Type: text , Article
Identifier: vital:6415 , http://hdl.handle.net/10962/d1006526
Description: The structure of the title compound [(C7H4NO8U)(C7H11N2)]2 has been determined by Patterson and Fourier methods from single crystal X-ray diffraction data collected on a four-circle diffractometer. Full-matrix least-squares refinement yielded a final conventional R of 0.041 for 2189 reflections. The complex crystallizes in the space group P with a = 11.004(5), b = 9.981(5), c = 9.928(5) Å, α = 119.6(3), β = 107.7(3), γ = 81.9(3)°, Dm = 2.17, Dc = 2.173g cm−3. The structure is dimeric. The uranium atoms are eight-coordinate and are bridged via centrosymmetrically related carboxylic oxygen atoms. The nitrate group is bidentate and the average U---O (ligand) distance is 2.463 Å. Hydrogen bonding of the type N---HO links two dimethyl-aminopyridine molecules to the dimer.
Full Text:
Date Issued: 1976

Quick View

The influence of abiotic factors on the distribution of Biomphalaria pfeifferi (Krauss, 1848) (Planorbidae: Mollusca) and its lifecycle in South-Eastern Africa

- Appleton, Christopher Charles

Authors: Appleton, Christopher Charles
Date: 1976
Subjects: Schistosomiasis , Mollusks as carriers of disease
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:5835 , http://hdl.handle.net/10962/d1009495 , Schistosomiasis , Mollusks as carriers of disease
Description: Previous studies on the influence of abiotic factors on the distribution of bilharzia intermediate host snails of the family Planorbidae are reviewed. Much of this work is basically descriptive and relatively few attempts have been made to examine the effects of these factors on snails in their natural habitats - to identify the factors precisely and to measure their critical levels. An account is given of recent studies on Eiomphalaria pfeifferi (Krauss) in two climatically different regions of southeastern Africa, at 6S5m altitude on the eastern Transvaal escarpment and 19m on the coastal peneplain of northern Zululand. These have shown the species to undergo a similar annual life-cycle of three overlapping generations in both areas. Further, in these areas where the snail has a discontinuous distribution, two abiotic factors, stream geology and water temperature, were found to be important in limiting its distribution. The longitudinal distribution of B. pfeifferi and another host snail Bulinus (Physopsis) globosus (Morelat), extended upstream in a perennial watercourse, the Gladdespruit, on the escarpment only as far as permanently lentic habitats were available. These habitats, usually detached from the channel, characterized the stream's lowest physical zone with its substratum of exposed granite, as opposed to the sandy-bottomed lotic zones upstream. The limit of the snails' occurrence lay close to the junction of these two substratum types. Granite is resistant to erosion but contains soft inclusions which erode more quickly than the hard matrix causing uneven weathering. This results in the formation of depressions in the stream bed (i.e. pools, potholes and backwaters) which provide the permanently lentic conditions necessary for the snails' survival. Temperature recordings made on this plain, upstream of the snails' limit, suggest that the water temperature here exceeded the critical lower levels required for a positive intrinsic rate of natural increase sufficiently often to permit the species to survive here, though not optimally. Above this point however, current velocities are continually in excess of the maximum tolerated (0.3 m/sec.) so that in this situation at least, current velocity is a dominant factor. A contrasting situation exists on the coastal peneplain of northern Zululand where B. pfeifferi occurs in some lentic habitats and not in others. This discontinuous distribution is shown to be related to the prolonged duration of temperatures above the level for optimal increase. The apparently suitable habitats from which B. pfeifferi was absent were found to be both very shallow and to experience these prolonged high temperatures during spring and early summer. This corresponds to the maturation period of the B. pfeifferi 1st generation as defined by Appleton (1974) and causes reduced fecundity probably through impaired gonad development. The density of its filial (2nd) generation is correspondingly reduced. A statistically significant partial-correlation (at a 1% level) was found between the fecundity of the 1st generation and increasing periods of temperatures above the species' optimal limit in the habitats involved during its maturation period (spring). It is interesting to nate here that B. (Ph.) globosus, which is known to be better adapted to high temperatures than B. pfeifferi (Shiff & Husting, 1966) occurred in all the waterbodies concerned. Both these factors therefore play important roles in determining the country-wide distribution pattern of the host snails. This distribution is closely correlated with the availability of permanently lentic habitats. In river systems, which form the main environment for these snails, such stable habitats occur almost entirely in low-gradient reaches over hard bed-rock which is resistant to erosion. Current velocities above 0.3 m/sec. render steeper reaches and those over soft, non-resistant rock and sand (unstable substrata) unsuitable and therefore constitute a most important limiting factor. Temperature however becomes a dominant factor in permanently lentic waterbodies. Biomphalaria pfeifferi is adversely affected by high temperature regimes and where such regimes occur in waterbodies which are too shallow to permit temperature gradient to develop, the species cannot survive whereas B. (Ph.) globosus can do so. This intolerance of high temperature regimes on the part of B. pfeifferi accounts for the species' adoption of a discontinuous distribution over the coastal plain of south-eastern Africa. A comparable pattern has been reported for the species over this plain northwards to approximately 16°S latitude in Mozambique and is probably due to a similar high-temperature effect. Further northwards in equatorial latitudes B. pfeifferi is restricted to the more elevated and cooler areas above an altitude of 500 - 600 m, probably because the very high temperature regimes prevailing in the lowlands there exclude the species altogether.
Full Text:
Date Issued: 1976

Quick View

The Jesus People : attitude, personal-orientation and life-style changes as a function of non-conformist religious influence

- Stones, Christopher R

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

Quick View

The keyboard sonatas of Pietro Augusto : an investigation into their formal and stylistic apsects

- Radloff, Timothy Edward Kingswell

Authors: Radloff, Timothy Edward Kingswell
Date: 1976
Subjects: Augusto, Pietro , Sonatas (Piano)
Language: English
Type: Thesis , Masters , MMus
Identifier: vital:2689 , http://hdl.handle.net/10962/d1013047
Description: This thesis supplements "The Piano Sonata of the Eighteenth Century in Germany" (Vol. 2 in the publication series "Contributions to the development of the Piano Sonata"). It does not aim at a comparative study between Pieto Augusto and his contemporaries but intends to establish the composer's individual characteristics in the light of the general development of the piano sonata during the eighteenth century.
Full Text:
Date Issued: 1976

Quick View

The Late Cenozoic history and palaeoenvironments of the coastal margin of the south-western Cape Province, South Africa

- Tankard, Anthony James Tempest

Authors: Tankard, Anthony James Tempest
Date: 1976
Language: English
Type: Thesis , Doctoral , PhD
Identifier: vital:21068 , http://hdl.handle.net/10962/6257
Description: This thesis examines the Late Cenozoic history and palaeoenvironments of the coastal margin between Elands Bay on the west coast and Die Kelders on the south coast. This study is introduced with a detailed discussion of eustatic sea level oscillation. The history of the existing ice sheets, sea floor spreading, isotopic composition changes of the oceans, and isostatic responses of the crust to varying loads are reviewed with regard to their bearing on sea level changes. A detailed account of the Neogene stratigraphy of the south-western Cape Province is presented. The Middle to early Late Miocene Saldanha Formation is characterised by shallow marine phosphatic sandstone and phosphorite. It is thought to have been deposited in a warm transgressive sea. The Pliocene Varswater Formation was deposited during a secondary transgression induced by.seaward tilting of the coastal margin during a time of worldwide regression. The Varswater Formation is characterised by pelletal phosphorites. It includes marine, estuarine, and fluvial facies. The estuarine sands and peats contain a rich fossil mammal fauna. Depositional environments of the Pelletal Phosphorite Member are examined by means of conventional grain size analysis to show that deposition took place on a shallow sublittoral platform dominated on the outer edge by a breaker-bar. Accretion of the breaker-bar to form a barrier-island allowed the development of an estuarine complex on the leeward side. Post-depositional diagenetic changes were examined by means of scanning electron microscopy. A detailed account of the petrology and geochemistry of the phosphorite and pelletal phosphorite is presented. The apatite mineral is a carbonate fluorapatite. It is concluded that the phosphorite is related to upwelling of phosphorus-rich waters.
Full Text:
Date Issued: 1976

Quick View

The multiple image in art : a personal response

- Swift, Anthony J M

Authors: Swift, Anthony J M
Date: 1976
Subjects: Art, Modern -- 20th century , Art -- Themes, motives , Art appreciation , Art, Modern -- 20th century -- Philosophy
Language: English
Type: Thesis , Masters , MFA
Identifier: vital:2497 , http://hdl.handle.net/10962/d1013330
Description: The development of this thesis is akin to that of a painting. It is subject to various influences that have evoked ideas and each idea has stimulated other ideas, thus the continuity could have gone beyond the bounds of this work. It is not so much an amalgamation of similar ideas but a development of diverse ideas which have, once composed, a common factor - the Multiple Image. Image refers to some paintings that have been made or part of them, a photograph, a film, a subject visualized in the mind or a complex reforms which is suggestive. Multiple refers to anything that relatively repeats itself, has facsimilies of itself, triptychs, polyptychs or is a conglomeration of ideas in a work of art. Intro., p. 1.
Full Text:
Date Issued: 1976

Quick View

The structure of aliphatic amine adducts of uranyl acetylacetonate. I. Dioxobis(2,4-pentanedionato)mono (2-N-methylaminopentan-4-one)uranium(VI)

- Haigh, John M, Nassimbeni, Luigi R, Pauptit, Richard A, Rodgers, Allen L, Sheldrick, George M

Authors: Haigh, John M , Nassimbeni, Luigi R , Pauptit, Richard A , Rodgers, Allen L , Sheldrick, George M
Date: 1976
Subjects: Aliphatic amine adducts , Uranyl acetylacetonate
Language: English
Type: Article , text
Identifier: vital:6373 , http://hdl.handle.net/10962/d1006077
Description: Crystals of the title compound are monoclinic with a= 8.314 (5), b= 22.723 (9), c= 12.589 (6) A, /3= 123.0 (2t, Z=4, space group P2dc. The structure was determined by Patterson and Fourier methods and refined by full-matrix least squares to a final R of 0.030 for 2043 independent reflexions. The U atom has pentagonal bipyramidal coordination and the N-methylacetylacetoneamine is bonded to U via O. There are two intramolecular N-H. . .0 hydrogen bonds which govern the geometry of the adduct molecule.
Full Text:
Date Issued: 1976

Quick View

The term structure of interest rates in South Africa

- Dollery, Brian

Authors: Dollery, Brian
Date: 1976
Subjects: Interest rates -- South Africa
Language: English
Type: Thesis , Masters , MA
Identifier: vital:1083 , http://hdl.handle.net/10962/d1011180 , Interest rates -- South Africa
Description: Since the late ' fifties the term structure of interest rates has attracted considerable attention from both theoretical and empirical economists. While potentially a very fruitful area for the application of the traditional methods of economic enquiry, the term structure has proved itself to be a potent testing ground for these tools, and consequently a wide range of sophisticated analytic devices have been introduced, Despite this, no general agreement has yet been reached and a number of crucial questions remain unanswered. It is our task in this dissertation to extend the enquiry into the South African context in an attempt to shed some light on the determination of the term structure of interest rates. Intro., p. 1.
Full Text:
Date Issued: 1976

Quick View

The vocation of man and the Great Commission: a theological dissertation based on the doctrine of reconciliation in Karl Barth's Church Dogmatics

- Fourie, Ethne Maud

Authors: Fourie, Ethne Maud
Date: 1976
Subjects: Barth, Karl., 1886-1968 Theology, Doctrinal Great Commission (Bible) Reconciliation -- Biblical teaching
Language: English
Type: Thesis , Bachelor , BDiv
Identifier: vital:1252 , http://hdl.handle.net/10962/d1011870
Description: The purpose of this thesis is to establish a theological basis for an ecclesiology which takes account of the claim which the Lordship of Jesus Christ asserts over his appointed servants and the appropriate response from the Christian community corporately and from the members of the community individually. The interpretation and application of Christian discipleship by liturgical acts of the community in which the individual members participate and are prepared, trained and nourished for the purpose of equipping them for their corporate and individual task of witness is based on the promise and command of Jesus Christ recorded in Acts 1:8. The theological interpretation of the key concepts of the promise of power in the Holy Spirit and the commission to witness in the world is based on the theology of Karl Barth. Chapter I outlines the immediate context of the doctrine of vocation and the sending of the Christian community and the wider context of the doctrine of reconciliation and its place in the whole of theology. Chapters II and III enlarge on the vocation of man and the sending of the Christian community in the power of the Holy Spirit as the two parts of the doctrine of reconciliation which have particular relevance for our interpretation of the great commission. Chapter IV is devoted to a hypothesis of a special ethic based on Barth's unfinished work and Appendix A to methodological outline. Appendix B considers the practicality of this hypothesis in the light of two contemporary ecumenical interpretations and applications of the great commission. A concluding critique recognises the problems of the hypothesis and the inevitable problems that arise from any attempt to formulate a system or to define in precise categories the unique event of God's free and gracious love poured out and given to us in his Son, Jesus Christ our Lord.
Full Text:
Date Issued: 1976

Quick View

Blue Notes for Mongezi

- Miller, Hazel, Beal, Keith

Authors: Miller, Hazel , Beal, Keith
Subjects: McGregor, Chris--1936-1990 , Blue Notes (Musical group : South Africa) , Feza, Mongezi , Pukwana, Dudu , Moholo, Louis T.--1940- , Dyani, Johnny Mbizo , Jazz musicians
Language: English
Type: Article
Identifier: vital:13561 , http://hdl.handle.net/10962/d1006445 , McGregor, Chris--1936-1990 , Blue Notes (Musical group : South Africa) , Feza, Mongezi , Pukwana, Dudu , Moholo, Louis T.--1940- , Dyani, Johnny Mbizo , Jazz musicians
Description: Photocopied album cover and booklet of the recording "Blue Notes for Mongezi". "This music was recorded in London. It is the spontaneous tribute of four musicians who had assembled for the Memorial Service for their friend". There is a picture of a black child on the front cover. A picture of Mongezi Feza holding his trumpet is on the second page and a picture of the early Blue Notes is on the third page. A portrait of the 4 musicians who recorded this LP are on the back cover. From left to right and top to bottom, we can see, Dudu Pukwana playing saxophone, Chris McGregor, Louis Moholo and Johnny Dyani.
Full Text:

Quick View

Chris McGregor

- Atkins, Ronald

Authors: Atkins, Ronald
Subjects: McGregor, Chris -- 1936-1990 , Jazz , Jazz musicians , Brotherhood of Breath (Musical group) , Parker, Evan , Dean, Elton , Moholo, Louis T. -- 1940- , Pukwana, Dudu
Language: English
Type: Article
Identifier: vital:13476 , http://hdl.handle.net/10962/d1001398 , McGregor, Chris -- 1936-1990 , Jazz , Jazz musicians , Brotherhood of Breath (Musical group) , Parker, Evan , Dean, Elton , Moholo, Louis T. -- 1940- , Pukwana, Dudu
Description: Photocopied article about a concert at QEH (Queen Elizabeth Hall) in London, England, by Chris McGregor and the Brotherhood of Breath.
Full Text:

Quick View

Showing items 41 - 60 of 67