Mite-poësie : die mite-skepping in die poësie van William Butler Yeats en Adriaan Roland Holst
- Authors: Milne, Sarah Elizabeth
- Date: 1967
- Subjects: Yeats, W. B. (William Butler), 1865-1939 -- Poetic works , Yeats, W. B. (William Butler), 1865-1939 -- Criticism and interpretation , Roland Holst, Adrianus, 1888-1976 -- Criticism and interpretation , English poetry -- 20th century -- History and criticism , Dutch poetry -- 20th century -- History and criticism , Mythology, Celtic , Mythology in literature
- Language: Afrikaans
- Type: Thesis , Masters , MA
- Identifier: vital:3640 , http://hdl.handle.net/10962/d1013518
- Description: In my kennismaking met die poësie van Yeats en Roland Holst het ek onvermydelik opgemerk dat hulle sekere simbole ooreenkomstig gebruik, dat hulle dieselfde hoë, aristokratiese waardes handhaaf en gevolglik 'n afkeer het van die moderne massa-demokrasieë. Later het ek ontdek dat albei digters sterk in die Keltiese mites en sages belang gestel het en dat Roland Holst Yeats as 'n belangrike invloed eien. Dit alles, en die feit dat hulle albei enkele gegewens uit die Griekse mitologie daarby voeg in wat hulle "mites" word, het my voorgekom as goeie rede vir 'n vergelykende studie. So 'n ideë-studie het egter gedreig om iets heel anders te word as die literêre beskouing wat ek beoog het. Geleidelik het dit egter geblyk dat die mite méér moet wees dan die ideë-sisteem; en juis dit waardeur die mite meer is dan ideë-sisteem het die belangrikste regverdiging geword vir 'n vergelykende studie, en terselfdertyd, vir 'n toespitsing van die aandag op die poësie.
- Full Text:
- Date Issued: 1967
Reason and eros
- Authors: Chalmers, W D
- Date: 1967 , 2014-06-09
- Subjects: Philosophy , Love , Reasoning
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2748 , http://hdl.handle.net/10962/d1013331
- Description: This study is not intended as a work of research into any existing body of philosopny. It is, rather, an independent inquiry into the origins and the objective of philosophical activity. In this it assumes the somewhat enigmatic role of a philosophy of philosophy.
- Full Text:
- Date Issued: 1967
Scientific research, innovation and economic growth : a possible relationship
- Authors: Phillips, Bruce D (Bruce Dalton)
- Date: 1967
- Subjects: Research -- Economic aspects , Technological innovations , Research -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1096 , http://hdl.handle.net/10962/d1013027
- Description: Resources devoted to science, or rather to "new science" or research and development and related technical activities have undergone a remarkable rate of increase over the past two decades throughout most of the world. This phenomenon has been symptomatic not only of the development of the majority of nations in the 'western world' but also of the Soviet bloc, and furthermore, all the indications are that this expansion of scientific activities will continue throughout the present decade. Intro., p. 1.
- Full Text:
- Date Issued: 1967
The naive moral as a possible mental attitude behind the outlaw-motif in English medieval narratives and its influence upon the structure of Thomas Lodge's "Rosalynde" and Shakespeare's "As you like it"
- Authors: Ruthrof, Horst
- Date: 1967
- Subjects: Literature and morals , English literature -- Middle English, 1100-1500 , English literature -- Early modern, 1500-1700
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2312 , http://hdl.handle.net/10962/d1013105
- Description: The idea for this thesis originated in a seminar concerned with short forms of epic literature. It is meant to throw some light on the development of rudimentary narrative technique, especially on the influence a particular motif can exert on a writer's mind and the final form of his work. Preface, p. 7.
- Full Text:
- Date Issued: 1967
A contribution to the respiratory physiology of three South African freshwater pulmonate snails, Bulinus (Physopsis) Africanus (Krauss), Bulinus (Bulinus) Tropicus (Krauss), and Lymnaea Natalensis Krauss
- Authors: Alberts, I E
- Date: 1966
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:20965 , http://hdl.handle.net/10962/5696
- Description: From Introduction: The use of chemical molluscicides in the control of schistosome transmitting snails has been largely based on empirical studies of toxicity, rather than on a clear understanding of basic physiology and biochemistry of snail hosts. It is therefore possible that purely physiological studies may in themselves provide information which could be of value in the development of more effective mollucicides. In this investigation an attempt has been made to understand some aspects of the respiratory physiology of three species of fresh-water pulmonate snails, all of which are of medical and veterinary importance in the Republic of South Africa. Bulinus (Physopsis) africanus (Krauss) is the intermediate host of Schistosoma haematobium, the causative organism of human schistosomiasis (Bilharziasis). Bulinus (Bulinus) tropicus (Krauss) is the intermediate host of the conical flukes Calicophoron calicophorum and Paramphistomum microbothrium and of the liver fluke Fasciola hepatica, while Lymnaea natalensis Krauss is the intermediate host of the liver fluke Fasciola gigantica.
- Full Text:
- Date Issued: 1966
An investigation into the importance of rhythmic and melodic variation for Brahm's development sections, with special reference to his four symphonies
- Authors: Schoeman, Delene Letitia
- Date: 1966
- Subjects: Brahms, Johannes, 1833-1897 -- Symphonies , Variations -- History and criticism
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:2690 , http://hdl.handle.net/10962/d1013170
- Description: "Variation is one of the oldest and most elemental types of music, beloved and practised by all musicians since the early lute and keyboard composers." The principle of the variation is that of "variety within unity, secured by the reproduction of limited musical material in changing aspects and is fundamental to composition." Typical instances are the use of fugal themes in changing combinations and with changing counter-material; continuous sequential expansion of a single motif in the baroque sonata or suite; the symphonic development in classical sonata form; ornamentation, compression, extension or elaboration of recapitulated sections. Intro., p. 1.
- Full Text:
- Date Issued: 1966
Aspects of reality as reflected by the human form in painting
- Authors: Fourie, F T
- Date: 1966
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:21174 , http://hdl.handle.net/10962/6739
- Full Text:
- Date Issued: 1966
Describing behaviour: a philosophical analysis
- Authors: Bunting, I A
- Date: 1966
- Subjects: Human behaviour -- Philosophy , Analysis (Philosophy)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2744 , http://hdl.handle.net/10962/d1009991 , Human behaviour -- Philosophy , Analysis (Philosophy)
- Description: Questions revolving around the possibility and justifiability of reductive analyses of the concept 'not', lie at the heart of many of the problems in the philosophical interpretation of not-descriptions. In this thesis, I wish to show, by discussing various problems in the logic of not-descriptions, that, and why, reductive analyses must be unsatisfactory.
- Full Text:
- Date Issued: 1966
Electron precipitation and ionospheric disturbance
- Authors: Torr, Marsha R
- Date: 1966
- Subjects: Electrons , Electron precipitation , Ionosphere , Ionospheric electron density
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5509 , http://hdl.handle.net/10962/d1007691
- Description: From Introduction: The minimum in the scalar magnitude of the geographic total field, which lies off the coast of Brazil, allows the mirror points of trapped particles to dip low into the atmosphere over the South Atlantic Ocean, resulting in two regions of maximum intensity of preciptated particles in that region, one from the inner belt and one from the outer. High charged particle fluxes have been observed at low altitudes over these regions by satellites Sputnik 5 and 6 (Ginsburg et al, 1961) and Discoverer 31 (Seward and Kornblum, 1963) amongst others. The more southerly of these two regions acts as a sink for electrons from the outer radiation belt and will be referred to in what follows as the Southern Radiation Anomaly. Gladhill and van Rooyen (1963) predicted that the energy deposited in the upper atmosphere by these charged particles would be sufficient to give rise to enhanced geophysical effects such as auroral emission, X-rays and ionization and heating of the upper atmosphere in this region. Although some of these effects have been correlated with precipitated electrons, no definite relation had until now been established between ionospheric effects and precipitated particles. The aim of this thesis was to investigate such a relationship and the results were extremely successful. It will be shown conclusively in what follows, that the precipitation of electrons can account for the ionospheric disturbances defined by a disturbance criterion at all stations around L=4. Part I describes the exploration of the radiation belts and the magnetosphere with rockets and satellites. The resulting theoretical models based on the observations are discussed. A brief review is given of the work that has been done to date to derive equations for the loss and replenishment of particles in the belts. Because of the complexity of these and the number of doubtful factors involved, a simple model of injection of electrons into the outer belt is devised, giving average values of trapped and precipitated electron fluxes at any point around L=4. In Part II, this model is employed together with the disturbance criterion of Gledhill and Torr (1965) to examine the relationship between ionospheric disturbances and electron fluxes. Also the energy range of the precipitated particles is examined.
- Full Text:
- Date Issued: 1966
Proportional distribution of predominant rumen bacteria between the solid and the liquid portions of ruminal ingesta
- Authors: Brinkman, Paul A
- Date: 1966
- Subjects: Rumen -- Microbiology , Bacteria -- Rumen
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4100 , http://hdl.handle.net/10962/d1009715 , Rumen -- Microbiology , Bacteria -- Rumen
- Description: That certain bacteria in the rumen of sheep and cattle are attached to solid particles in the ruminal ingesta has been known for many years. In 1942 Baker published direct microscopical evidence that bacteria were attached to cellulose food particles and to starch granules in the rumen. The sites of attachment of these bacteria corresponded to sites of disintegration of the particles when viewed by polarised light. This indicated that at least bacteria attacking solid substrates such as cellulose and starch were attached to particles of ruminal ingesta. Van der Wath (1942) found rumen bacteria attached to particles of chemically pure cellulose and of crushed maize which he suspended in separate compartments of a pure silk bag inside the rumen of sheep. The bacteria associated with the particles of cellulose were mainly Gram negative rods , while clusters of iodophilic cocci were observed in most instances around the maize kernels . The latter organisms were isolated in pure culture and found to be heat-tolerant, short-chain, Gram positive cocci fermenting glucose, maltose, and other soluble sugars as well as starch. It was thus not surprising that many years later Schwartz et al (1964) obtained evidence which suggested that bacteria metabolising soluble substrates such as glucose also showed marked attachment to solid particles of ingesta.
- Full Text:
- Date Issued: 1966
Shylock's origins and evolution : the image of the Jew in English literature from the middle ages to the mid-seventeenth century
- Authors: Durbach, Errol
- Date: 1966
- Subjects: Shakespeare, William, 1564-1616 -- Characters -- Shylock , Judaism and literature , English literature -- Early modern, 1500-1700 , English literature -- Middle English, 1100-1500
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2322 , http://hdl.handle.net/10962/d1014821
- Description: [From Preface]. Any study centred in the exploratlon and analysis of the medieval and Elizabethen images of the Jew might, with some justification. seem redundant and impertinent to a modern reader; for the third quarter of this century has witnessed the almost total obviatlon of a great many such time-honoured images and symbols. The immemorial figure of the Wandering Jew, to cite a sIngle instance, has for the past two decades, attained his country and place of destination - history no longer condemning him to tarry until the Second Coming of the Messiah. Even the deicide Jew has been granted complete absolution, by an offlcial decree from the Vatican, for his complicity in the killing of Christ. It would seem, moreover, that the atrocities perpetrated against the Jews during the course of the Second World War have resulted in an alteration of the Jewish image radically transforming It from one of contempt into one of compassion a living symbol of "man's inhumanlty to man"; and the modern European dramatist has revived the Jewlsh figure on the stage as an instance of almost personal atonement or, alternatively, as a means of scourging the state of middle-class mind which abetted the persecution of the Nazi regime, attacking state policies of inactio and deploring the failure of influentlal powers to resist the blatant inhumanlty perpetrated within Its boundaries. Max Frisch's Andorre and Rolf Hochhuth's The Representative embody, each in its own way the 2Oth century's sense of shame and horror at those events with which the century has yet to come to terms. They are both extreme reactions agalnst the image of the Jew whlch the Nazi propogandized in the 1930s. And the image which the Nazis propogandized was curiously consistent wlth the medieval and Elizabethan images of the Jew.
- Full Text:
- Date Issued: 1966
The constituents of the resin of Euryops floribundus. N.E.Br.
- Authors: Woolard, Graham Robert
- Date: 1966
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4510 , http://hdl.handle.net/10962/d1013449
- Description: The aerial portions of the plant Euryops floribundus were extracted and shown to contain Euryopsonol and another sesquiterpenoid for which the name Euryopsol is proposed. An extraction of Euryops tenuissimus contained Euryopsol only. Euryopsonol, of empirical formula C₁₅ H₂₀ O₃, was previously shown to contain a hydroxyl group and a keto-group and to be doubly unsaturated. The hydroxyl group has been shown to be secondary, while the keto-group is ⋉, β, γ, δ-unsaturated, Spectroscopic and Mass spectrosmetric measurements showed euryopsonol to possess a furan ring and to be member of the eremophilane -9 of sesquiterpenoids . These proposals were confirmed by the conversion of euryopsonol to furanoeremophilone -9, thus establishing the stereochemistry at C₄, C₅ and C₁₀. This free hydroxyl group has been placed at C₃, but its stereochemistry is still unknown. Euryopsol, of empirical formula C₁₅ H₂₂ O₄, possesses an unstable furan ring and readily undergoes autoxidation, probably to a more stable ¥-lactone. It contains two vicinal hydroxyl groups, one of which was placed by Mass spectrometry at C₉. If euryopsol possesses the eremophilane skeleton the other hydroxyl group must be at C₁₀.
- Full Text:
- Date Issued: 1966
The geology of the Vaal Reefs Gold Mine, Western Transvaal
- Authors: Jacob, Roger E
- Date: 1966
- Subjects: Vaal reefs gold mine , Gold ores -- Geology -- South Africa -- Transvaal. , Geology -- South Africa -- Transvaal
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5078 , http://hdl.handle.net/10962/d1015171
- Description: Rocks forming part of the Main-Bird Series and the Kimberley-Elsburg Series of the Upper Division of the Witwatersrand System are found in the mine. The sequence studied starts with the Middle or MB 6 Zone of the Livingstone Stage followed by the Upper or MB 5 Zone. The Vaal Roof, forming the base of the Vaal Stage, rests disconformably on the older rocks. The Stage is subdivided into the Vaal Reef Zone, the Lower Vaal Zone, the Argillaceous Zone and the Upper Vaal Zone. The lower and upper contacts of the Argillaceous Zone are gradational. The Kimberley Stage follows unconformably and comprises the basal Gold Estates Conglomerate Zone, the Denny's Zone and the Gold Estates Zone. The overlying Elsburg Stage may be subdivided into the Bastard Zone and the Upper Elsburg Zone on lithological grounds. Most of the rocks are indurated quartz wackes with only a few orthoquartzite horizons such as the Denny's Zone and the immediate hangingwall of the Vaal Reef. Microscopically the rocks consist of detrital quartz and chert grains in a fine-grained sericitic to partly siliceous matrix which may constitute more than 50 per cent of the rock. Heavy minerals, such as zircon, chromite, rutile, leucoxone, pyrite, tourmaline, epidete, apetite and magnetite, occur in most of the zones. The Vaal Reef, the economic horizon, is of small-pebble, oligomictic conglomerate, often containing thucholite seams and granules, and varying in thickness from a mere parting to more than five feet. There appears to be a correlation between greater pebble size and higher ore grade but no correlation of sorting coefficients and gold value. The mineralogy of the Vaal Reef was studied by means of polished sections and heavy mineral concentrates. The minerals identified include gold, pyrite of several ages, pyrrhotite, chalcopyrite, uraninite, galena, brannerite, gersdorffite or cobaltite, skutterudite, linnacite, danaite, niccolite, pentlandite, magnotite, zircon, chromite, rutile, leucoxine, monazite, sphalerite, tourmaline, and fluorite. From a study of the silver content of gold in the Vaal Roof it is concluded that the variations in apparent fineness are a reflection of the composition of the gold in the original source rocks. There is a definite uranium-gold relationship in the Vaal Roof. With increase in grade the amount of U₃O₈ increases but the U₃O₈:AU ratio decreases. Use of these reations may indciate the payability in cases of incomplete core recovery.The intrusive rocks were studies in detail. Six types of intrusive rocks were found. From oldest to youngest those are quartz diabase (of three varieties), amygdaloidal diabase, ilmenite mela-microdiorite, mottled microdiorite, olivine lamprophyre and ankeritic beforsite, ranging in age from Lower Ventersdorp to post-Karroo. Most of the intrusives are highly altered due to the effects of regional metamorphism and deuteric alteration. Later formations, such as the Langgeleven and Allanridge Formations of the Ventersdorp System and the Black Roof and Dolomite Series of the Transvaal System, occur on the property. The various formations have been subjected to faulting and folding.
- Full Text:
- Date Issued: 1966
The imagery of night: the significance of night in artistic images and philosophies
- Authors: Matthews, Thomas
- Date: 1966
- Subjects: Night in art
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2455 , http://hdl.handle.net/10962/d1007616 , Night in art
- Description: Introduction: At first glance, darkness is merely the absence of light, and is therefore negative; hence the traditional equation of night with death, evil and the creatures of the underworld. But a closer study will reveal that darkness is also a positive force; examples can be cited from various cultures where darkness was thought to have given birth to light. The subterranean is the realm of fertility; the worshippers of Dionysius realised this, as did the followers of the world-wide cult of the Great Earth Mother. The realm of darkness is also the habitat of the mystic. In this essay, we will attempt to define the nature of nocturnal imagery, and to trace the various ways in which mankind has sought to reconcile himself with the powers of darkness.
- Full Text:
- Date Issued: 1966
The morality play as prelude to Elizabethan drama
- Authors: Oosthuizen, Ann
- Date: 1966
- Subjects: Moralities, English , English drama -- Early modern and Elizabethan, 1500-1600 -- Classical influences
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2309 , http://hdl.handle.net/10962/d1012990
- Description: Although it is generally accepted that the Morality Plays greatly influenced Elizabethan drama, this statement is often followed by the rider that they are dull and lifeless and that their chief legacy is a sense of moral earnestness which also characterises the best Elizabethan drama. The aim of this thesis has been to read the Morality Plays closely and in an appreciative spirit in order to find out what significant contribution they do make to the techniques of Elizabethan drama and to a proper understanding of it. Chapter I discusses the earliest complete Morality, The Castle of Perseverance, which is the longest and most comprehensive of all the Moralities. The chapter tries to show what a Morality is about and how it differs from the great mediaeval cyclus, the Mystery Plays. It is also an attempt to relate the early Morality Play to other mediaeval literature and to show that it is closely linked to the homeletic literature of the period. Chapter II is a study of three Moralities of the period 1500- 1520. There are fewer Moralities in this period and the plays chosen show a marked similarity to The Castle of Perserverance in their structure, although they differ from the earlier Moralities in their attitude to their subject matter and in their portrayal of the different allegorical characters. The plays under discussion are Nature, Mundus et Infans and Magnyfycence Chapter III; the period after 1535 was a period of great political and religious upheaval and this chapter discusses the plays written for propaganda purposes in the strife between Catholic and Protestant. John Bale's Three Laws, an anti-Catholic play, was chosen because Bale is a startlingly original dramatist who makes use of techniques derived from the liturgy and from emblematic devices, and because he tries to mould the Mystery Plays and the History Plays into a Morality framework. The other plays The Conflict of Conscience was chosen because of its affinity to Dr Faustus and also because it tries to show the psychomachia in psychological, personal terms rather than in a general allegorical manner. Chapter IV discusses three later Moralities, Cambyses, Horestes and Appius Virginia, which portray historical or fictional characters in situations of conflict. They were chosen because they seem to show that the Morality Plays laid the bases for the Elizabethan tragic situation and the Elizabethan tragic hero. With such diverse material, it is difficult to trace a clear line of development from one play to the next, but each group of plays has its own contribution to make to our understanding of Elizabethan drama.
- Full Text:
- Date Issued: 1966
The salinity tolerance of some Eastern Province fish in relation to their known distribution
- Authors: Hofmeyr, Hendrik Petrus
- Date: 1966
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:21165 , http://hdl.handle.net/10962/6684
- Description: The tolerances to sea water, sodium chloride and sodium sulphate of various cichlid, cyprinid and anabantid species which occur naturally in or near the Eastern Province region of Southern Africa, were determined, and correlated with their distribution ranges. Of the nine freshwater species tested, only Tilapia mossambica is able to disperse through the sea and is therefore the only member of the secondary division (Myers 1937) present in this region. The remaining species are possibly all limited to the use of freshwater links for dispersal between river systems. Death of fish in sea water and in sodium chloride is chiefly due to loss of osmotic control, but in solutions of sodium sulphate a pronounced toxic effect is responsible for death. In all the solutions used, an inverse relation between survival time and concentration is present. No evidence of any cells specialised for salt excretion was found in the gills of fish exposed to various salt concentrations.
- Full Text:
- Date Issued: 1966
A probability operator
- Authors: Sinclair, Allan M
- Date: 1965
- Subjects: Mathematics , Probabilities
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5423 , http://hdl.handle.net/10962/d1007702 , Mathematics , Probabilities
- Description: From Introduction: In probability theory it is often convenient to represent laws by characteristic functions, these being particularly suited to classical analysis. Trotter has suggest ted that probability laws can also be represented by probability operators. These operators are easily handled since they are continuous, and hence bounded, positive linear operators on a normed linear space. This representation arises because distribution functions and their complete convergence correspond to probability operators and their complete convergence. Hence the relations between distribution functions and probability operators will be discussed before the introduction of probability laws.
- Full Text:
- Date Issued: 1965
The effect of different levels and intervals of application of ammonium sulphate on the growth, chemical composition and yield of cayenne and queen pineapple plants under field conditions
- Authors: Van Lelyveld, Louis Johannes
- Date: 1965
- Subjects: Pineapple -- Crop yields , Plants -- Nutrition -- South Africa , Growth (Plants) , Nitrogen fertilizers , Field Crops -- Nutrition , Ammonium sulfate
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4263 , http://hdl.handle.net/10962/d1013422
- Description: From the Introduction. The fertilisation of pineapples in the Eastern Cape Province is still a relatively new practice which started approximately twelve years ago. Even after this time many growers still insist that pineapples can be grown without fertilisation on virgin soils. As the available virgin soil decreased, however, so the interest in fertiliser application increased. Very little basic research on the fertiliser requirements of pineapples in the Eastern Cape was done to serve as a guide to growers. The available advisory literature by le Roux (1951), Malan (1954) and Lewcock (1956) were based on overseas experience. When pineapple research was started on a large scale, in 1955, it was realised that emphasis should be placed on the nutritional requirements on virgin as well as replanted soils. From initial experiments it was clear that the main response in plant growth and yield was obtained from nitrogenous fertilisers.
- Full Text:
- Date Issued: 1965
The effect of varying heavy metal balances in the nutrient medium, on the growth and development of Aspergillus Sp. and Penicillium Sp.
- Authors: Breen, C M
- Date: 1965
- Subjects: Heavy metals -- Absorption and adsorption , Aspergillus -- Growth , Penicillium -- Growth , Fungi -- Nutrition
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4268 , http://hdl.handle.net/10962/d1014597
- Description: The study was conducted to investigate the effects of: (i) varying the level of supply of the heavy metals iron, manganese, copper and zinc. (ii) varying the ratio between different pairs of metals in the medium. In particular the iron:manganese and zinc:copper ratios were studied. Initially the two fungi Aspergillus niger van Tieghem, (variety and strain) and Penicillium notatum Westling, were used. Penicillium notatum Westling was subsequently discarded, in favour of Penicillium glancum Link, because it did not sporulate freely in liquid culture. The fungi were grown in controlled nutrient solutions, and during the course of tho growth and development, the form and sporulation of the felts was noted. After a period of growth, the felts were removed, dried and weighed. The pH of the liquor was measured. the results were studied to determine the effect of varying levels of supply of the heavy metals, and of the varying heavy metal ratios in the culture solution. In the investigation of the effect of varying the level of supply of individual heavy metals, optimum concentrations were demonstrated for copper and manganese. Increaning the concentration of pairs of heavy metals cimultaneously was found to influence the appearance and degree of symptoms of toxicity. Cultures of Aspergillus and Penicillium were found to be able to tolerate concentrations of copper, in particular, considerably greater than the observed optima, when zinc was present in equal concentration. Citric acid, and subsequently ethylene- diaminetetra-acetic acid, were used as chelating agents, in order to prevent the precipitation of the metals in the culture solution during autoclaving. It was found that the use of chelating agents markedly reduced symptoms of toxicity. There was no conclusive evidence that the iron:manganese ratio in the culture medium was an important factor in the growth and development of cultures of Aspergillus and Penicillium. However there is considerable evidence that in cultures of Penicillium, the zinc:copper ratio in the medium is of some importance in the determination of the dry weight yield trends. This effect was not demonstrated in cultures of Aspergillus.
- Full Text:
- Date Issued: 1965
The emotive qualities of light as a prime factor in artistic expression
- Authors: Brooks, R B
- Date: 1965
- Subjects: Light in art
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2502 , http://hdl.handle.net/10962/d1014659
- Description: What we do possess to-day as 'art' a faked music, filled with exotic and showcard effects, that every ten years or so concocted out of the form-wealth of millenia some new "style'' which is no style at all since everyone does as he pleases. A lying plastic that steals from Assyria, Egypt and Mexico indifferently. Yet this and only this, the taste of the "man of the world" can be accepted as the expression and sign of the age. Everything else, everything that sticks to old ideals is for provincial consumption. This is the year 1965 - nearly fifty years since Oswald Spengler published "The decline of the West" The paragraph I have quoted by way of justification for this dissertation is in turn a justiification of the fact that Spengler is as valid today as he was in 1918.
- Full Text:
- Date Issued: 1965