The border region : a geographical study of land utilization
- Authors: Board, Christopher
- Date: 1961
- Subjects: Land use -- South Africa -- Cape of Good Hope , Vegetation and climate -- South Africa -- Cape of Good Hope , Geology -- South Africa -- Cape of Good Hope , Cape of Good Hope (South Africa) -- Environmental conditions
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4884 , http://hdl.handle.net/10962/d1013512
- Description: From Summary: This is a geographical study of land use in the Eastern Cape Province. The land use pattern, although related closely to the features of the natural environment, is perhaps even more closely related to the spatial variations of the man-made environment, particularly to the disposition of the different racial groups with their different cultures and economies, and to the kaleidoscopic character of the settlement pattern.
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- Date Issued: 1961
The geology of the Bindura granite complex in Southern Rhodesia
- Authors: Bowen, David James
- Date: 1961
- Subjects: Geology -- Zimbabwe -- Bindura , Granite outcrops -- Zimbabwe -- Bindura
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5073 , http://hdl.handle.net/10962/d1013529
- Description: From Introduction: The object of the investigation was to examine the variations in the granite and the relation between the granite and the surrounding metamorphosed sedimentary rocks of the Shamvaian System (Primitive). Although this object may not have been fully achieved, it has been possible to show that a wide variety of rocks is present in the area, and a few suggestions as to their origin have been made.
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- Date Issued: 1961
Studies on the neuro-physiology of a free-living Platyhelminth
- Authors: Boyle, Sheila A
- Date: 1961
- Subjects: Platyhelminthes
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5902 , http://hdl.handle.net/10962/d1013541
- Description: From Resumé: The general picture of the physiology of invertebrate neuro-muscular systems as contrasted with the classical vertebrate system is presented and it is clear that one of the groups least investigated is the Phylum Platyhelminthes. An examination of the properties of the myo-neural system of a platyhelminth should be of interest, not only in itself, but also because of a possible relationship with the coelenterates, whose neuro-muscular system has been fairly extensively investigated. The aim of the present work was to determine some of the properties of the myo-neural system of a platyhelminth, and more especially those which would make possible a comparison with the myo-neural systems of other invertebrate phyla, and most particularly with the coelenterates. A preparation consisting of an entire decerebrate animal was used. The general anatomy of the musculature and basic plan of the nervous system are presented to facilitate an understanding of the experiments described, but a detailed examination of the relationships of nerves and muscles or of the innervation of the latter was not attempted. The spontaneous activity of such preparations was recorded kymographically and the characteristics of this activity under 'normal' conditions are described, together with observations on the effects on the normal spontaneous activity of treatments with sea waters of different ionic composition and with a number of drugs. The responses of the preparation to controlled electrical stimulation are also reported. The results are analysed and compared with the results of similar investigations on other invertebrate preparations, in particular the Anthozoa, and an interpretation of these results in terms of platyhelminth-coelenterate relations is discussed.
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- Date Issued: 1961
The culture plan : world techniques in uniformity : inaugural lecture delivered at Rhodes University
- Authors: Bradshaw, Brian
- Date: 1961
- Subjects: Culture
- Language: English
- Type: Text
- Identifier: vital:604 , http://hdl.handle.net/10962/d1020673
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
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- Date Issued: 1961
Butler's party
- Authors: Brown, William J
- Date: 1961
- Subjects: 1 inch = 200 Rhynland roods 30.5595° S, 22.9375° E , British settlers of 1820 (South Africa) Maps , South Africa History 1806-1910 Maps
- Language: English
- Type: maps , digital maps , cartographic
- Identifier: http://hdl.handle.net/10962/109569 , vital:33157 , Cory Library for Humanities Research, Rhodes University Library, Grahamstown, South Africa , MP468.470
- Description: Diagram of the location … and extension thereof ceded to Capt. Thomas Butler's party, now the farm Melville Park, in the district of Albany; surveyed 13th June 1826 [by] Wm. J. Brown. Photo negative.
- Full Text: false
- Date Issued: 1961
Carel's Rust Farm
- Authors: Brown, William J
- Date: 1961
- Subjects: 1 inch = 200 Rhynland roods 30.5595° S, 22.9375° E , Farms -- South Africa -- Albany Maps , South Africa History 1806-1910 Maps
- Language: English
- Type: maps , digital maps , cartographic
- Identifier: http://hdl.handle.net/10962/109611 , vital:33160 , Cory Library for Humanities Research, Rhodes University Library, Grahamstown, South Africa , MP471
- Description: Diagram of Carel's Rust in the division of Albany, field-cornetcy of Assegaai Bush, granted to Nicolaas Niemand; surveyed by Wm. J. Brown. Original date not identified. Negative photograph.
- Full Text: false
- Date Issued: 1961
South African Coloured National Convention, Claremont Civic Centre, 7th to 10th July 1961
- Authors: Convention Central Office
- Date: 1961
- Subjects: Coloured National Convention , Colored people (South Africa) , Civil rights -- South Africa , Apartheid -- South Africa , South Africa -- Race relations -- 20th century , South Africa -- Social conditions -- 1961-1994 , Human rights -- South Africa -- History -- 20th century , South Africa. South African Coloured National Convention
- Type: Text
- Identifier: http://hdl.handle.net/10962/31245 , vital:23928 , MS 10 801 , This manuscript is held at the Cory Library for Humanities Research at Rhodes University. For further information contact cory@ru.ac.za. The digitisation of this image was made possible through a generous grant received from the Andrew W. Mellon Foundation 2014-2017.
- Description: Programme outline for the South African Coloured National Convention, which took place in Claremont Civic Centre, Cape Town, from the 7th to the 10th of July 1961.
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- Date Issued: 1961
"The congregational way" : an historical study of the congregational doctrine of the church
- Authors: De Gruchy, John Wesley
- Date: 1961
- Subjects: Congregational churches , Congregationalism
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1276 , http://hdl.handle.net/10962/d1013317
- Description: From Preface: In this Ecumenical Age it is necessary that each Christian Communion consider again its particular doctrine of the Church, and restate it for the benefit of the whole Body of Christ. This Thesis is an attempt to show some historical and theological facets of the traditional Congregational doctrine of the Church. However, it must be stated that a full exposition of Congregational ecclesiology is an impossible task for any thesis. Firstly, inherent within Congregationalism is the fear of dogmatizing about matters of faith and practice. It has expressed itself in Statements and Declarations but always with the qualification that these things are 'commonly believed amongst us' Therefore, Congregationalism, while it has a characteristic ecclesiology, has never formulated a rigid pattern of Churchmanship which has to be adhered to by all the Churches. Secondly, a full study of Congregational ecclesiology would entail the study of the practices of every Congregational Church through the ages. That is an impossible task. Therefore, we have been confined to available material; but material which nevertheless expresses what we would regard as traditional congregationalism. Thirdly, a study of this nature must be content merely to state, however critically, what Congregationalists have believed about the Church at various times in the history of Congregationalism. It is impossible to convey the pulse and feeling of the life of a Congregational Church, for it is very important in seeking to understand any Churchmanship, not only to understand its theological form and structure, but also to experience its ' koinonia ' in its common life and worship.
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- Date Issued: 1961
The servant of Yahweh : a critical and exegetical study of the Servant Songs in Deutero-Isaiah
- Authors: Dijkman, Jan Hendrik Leonard
- Date: 1961
- Subjects: Bible -- Criticism, interpretation, etc. , Servant songs
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1293 , http://hdl.handle.net/10962/d1014812
- Description: For more than two thousand years the question of tbe identity of the Servant of Yahweh in Is. 40 - 55, and especially in the so-called "Servant Songs", has exercised the minds of students of the Old Testament. The first answer which we may trace with any certainty is that of the translator of this particular section in the Septuagint, who adds the words "Jacob" and "Israel" to the text. This is closely followed in the New Testament by the answer which Philip gave to the Ethiopian eunuch's query, "Of whom speaketh the prophet this ? of himself, or of some other ?" ( Acts 8:34f,). These two answers are typical of the two possible extremes in solving the problem. The first sees the Servant as a collective entity, the people Israel, while the second sees him as an individual figure, namely, Jesus Christ. The second answer explains why the interpretation of the Servant figure has been such a live issue throughout the entire history of Christendom. In it Christians have seen a prophecy of Jesus Christ - and more particularly in the suffering of the Servant, a prophecy of the facts which form the basis of the Christian Salvation, the death and resurrection of Jesus. Until the close of the eighteenth century, the generally accepted interpretation of the figure of the Suffering Servant among Christians was to identify him completely with Christ. With the development of the scientific study of the Old Testament during the last two centuries, every generation has raised the question afresh and sought to answer it. There is hardly an Old Testament scholar who has not laboured over it, and many have published their attempts at a solution. Hence the literature on the subject is enormous. In the present study no attempt has been made to give an exhaustive survey of all the interpretations of the Servant figure, but the text of the Servant Songs has been examined before an interpretation of the Servant figure was attempted. It is to be hoped that the final interpretation here given will reflect the thought of the prophet rather than that of the interpreter.
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- Date Issued: 1961
Lucan, poet of freedom : inaugural lecture delivered at Rhodes University
- Authors: Dilke, Oswald Ashton Wentworth
- Date: 1961
- Subjects: Epic poetry, Latin , History and criticism
- Language: English
- Type: Text
- Identifier: vital:619 , http://hdl.handle.net/10962/d1020688
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
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- Date Issued: 1961
Mai tswapiguruwe
- Authors: Domboshawa School , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Zimbabwe City not specified f-rh
- Language: Shona
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/316500 , vital:59837 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP2771-XYZ6283d
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
Nyere yendongi ino rira
- Authors: Domboshawa School , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Zimbabwe City not specified f-rh
- Language: Shona
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/316482 , vital:59833 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP2771-XYZ6283b
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
Chomusikara Mandega 1
- Authors: Domboshawa School , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Zimbabwe City not specified f-rh
- Language: Shona
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/316472 , vital:59831 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP2771-XYZ6283a
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
Miningwa, Miningwa chaenda mudondo
- Authors: Domboshawa School , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Zimbabwe City not specified f-rh
- Language: Shona
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/316492 , vital:59835 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP2771-XYZ6283c
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
The role of the church in an urban African society
- Authors: Dubb, Allie A
- Date: 1961
- Subjects: Bhengu, Nicholas B H, 1909- , Pentecostal churches -- South Africa -- East London
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3361 , http://hdl.handle.net/10962/d1011563 , Bhengu, Nicholas B H, 1909- , Pentecostal churches -- South Africa -- East London
- Description: This study is based on research carried out in East London, South Africa during the period September 1957 to August 1959 as an Assistant Research Officer of the Institute for Social and Economic Research, Rhodes University. The study is presented in three parts and its theme, broadly speaking, is the role of the church in an urban African society. In Part I, some aspects of the African Church in East London are discussed in general terms and an attempt was made to relate our own material with the findings of other researchers. Emerging from this discussion we have concluded that the Church could potentially play an important part in combating the social disorganization characteristic of urban locations in South Africa, but that on the whole this potential has not been fully exploited.
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- Date Issued: 1961
The history and the problems of Bantu urban secondary education in the Eastern Cape, 1937-1954 (Ciskei region)
- Authors: Dyasi, Hubert Mongameli
- Date: 1961
- Subjects: Black people -- Education -- South Africa -- Ciskei , Black people -- Education -- South Africa -- Eastern Cape -- History
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1997 , http://hdl.handle.net/10962/d1014827
- Description: 1. Reasons for Choosing the Topic. Much has been written about secondary education in England, Continental Europe, the United States, Canada, China and other countries mainly "because Secondary Education has been one of the most prized of all formal types of education ... because it has been the rung of the educational ladder that has led to opportunity and preferment". Very little research work has been done on Bantu secondary education in the Ciskei, and still less about Bantu urban secondary education. This is a shortcoming since the Ciskei has been one of the most important educational areas for the Bantu in the Union of South Africa and the territories outside her borders. It was here that the experiment of Bantu day secondary schools was carried out. It could aptly have been said of the Ciskei, too, that "experimental work (destined one day to blaze into a consuming fire) has been carried on, where men and women of faith and inspiration have lit up some dark corner of the field, and where teachers of genius have defied tradition and convention, gone their own way in scorn of consequence, and have lit a candle which will never be put out". The Bantu Urban Day Secondary Schools started amidst conflicting opinions as regards their advantages and disadvantages. Difficulties were encountered and efforts made to overcome them. The present writer attempts to show how the problems of these schools were overcome and to assess the progress that was made. 2. Need for the Study. There is a great need for the study of the history and problems of Bantu Urban Day Secondary education because for many years to come these schools will have to serve an increasing number of urban Bantu pupils. The results of the research may serve as a guide to teachers appointed to these schools. The important history of these institutions preserved only in the minds of old men and women, may be lost to posterity. There is also a great need to bring to light the unique problems confronting these schools. 3. Scope of Dissertation. The dissertation limits itself to Bantu Urban Day secondary education, in specific areas of the Ciskei. Two secondary and two high schools have been chosen for special study. Bantu Urban Day Secondary Schools are those schools which are situated in areas under the jurisdiction of municipalities or town councils irrespective of whether the school admits largely pupils who are outside such an area or only those within it or both. The entrance qualification to these schools has always been a pass in Standard VI (normally after eight years of primary or elementary schooling). For the Bantu pupil the Junior Certificate Course was of three years' duration. The successful completion of the J.C. course qualified pupils to train as nurses, in the case of girls, and agricultural demonstrators in the case of boys. Both sexes could undertake studies for Native Primary Higher Teachers' Course, and the Senior Certificate Course or the Matriculation leading to university degrees.
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- Date Issued: 1961
Gold fineness in hydrothermal ores : an investigation into the distribution of gold and silver in Southern Rhodesian gold ores
- Authors: Eales, Hugh V
- Date: 1961
- Subjects: Hydrothermal deposits -- Zimbabwe , Gold ores -- Zimbabwe , Silver ores -- Zimbabwe , Silver mines and mining -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5077 , http://hdl.handle.net/10962/d1014887
- Description: This investigation is concerned with primary variations in the silver content of gold which occurs in hydrothermal deposits, particularly those of hypothermal character which are found in Basement rocks in Southern Rhodesia. The nature of the gold produced by a number of different mines has been studied by reference to production data, and microscope techniques as well as gold and silver assays have been used to determine and to explain the variations in gold fineness. The literature does not contain a great deal of information which is relevant to this topic, but an attempt has been made here to summarize the more important contributions by different writers. From this it emerges that the interpretations given by different investigators are in conflict and that paradoxes may arise when efforts are made to explain observed variations in fineness in terms of certain generalizations which have become entrenched in the literaure. In particular, it is shown that falling temperature alone cannot account for the occurrence of silver-rich gold in certain deposits. The Gwanda district of Southern Rhodesia has been selected as a typical gold belt, and the variation in fineness in 150 producers is described. The deposits are hypothermal in character, and the average fineness of the gold is high but variable, but in a small proportion the fineness is low. It is shown that the nature of the host rock and the distance of a deposit from the granite contact appear to have no influence on the fineness of the gold and that there is no zonal arrangement of fineness values. There is a suggestion that diversity of mineral species in any particular area may be accompanied by rather wide fluctuations in the gold fineness. The variations of fineness in eight typical Southern Rhodesian deposits are studied in detail, by analysis of production data, by assaying specimens of the ore and by the examination of polished specimens of gold-bearing ore. Briefer reference is made to two other deposits in the territory, and to deposits in other countries which appear to bear out the conclusions reached in this section. It emerges that there are two factors which can commonly be correlated with variations in fineness. The first of these is the grade of the ore: high-grade ore generally contains purer gold than low-grade ore. Secondly, the textural evidence indicates that gold which separates relatively early in the paragenesis contains more silver than that which is deposited in the final stages of metallization. A general survey which draws on the literature as well as on the writer's examinations of deposits in the territory indicates that, in general, gold which is associated with late-stage minerals such as tellurides, antimony, bismuth and bismuthinite is silver-poor. Gold associated with galena may be either silver-rich or silver-poor, whereas gold which is of the same age as chalcopyrite or sphalerite is very frequently rich in silver. The difficulty which is encountered in establishing the age of gold which is intimately associated with pyrite and arsenopyrite renders uncertain the correlation between fineness and age of gold in these latter cases. There are, however, indications that gold which is truly contemporaneous with either pyrite or arsenopyrite is silver-rich. In the discussion, the objections to the common practice of singling out temperature as the most potent factor controlling gold fineness are listed. Chief amongst these objections is the fact that gold does not in all deposits increase in fineness with increasing depth: examples are quoted where fineness was found to decrease as deeper levels of the ore body were exploited. It is shown that there is no consistent relationship between the size of gold grains and their silver content. It is the writer's conclusion that in hydrothermal deposits in this territory the high fineness of the gold is due to increasing solubility of silver in the ore fluids in the late states, and that where hydrothermal deposits are characterized by gold with low average fineness, an unusually large proportion of the gold has been deposited early in the paragenotic sequence. In the majority of hypothermal deposits, however, the bulk of tho gold separates late in the sequence and the fineness is accordingly high. It is believed that the relationship which exists between fineness and tenor in many deposits is due to protracted crystallization of gold in those portions of the ore body which remained permeable to the latest stages. These portions of the ore body, which represent either valuable ore shoots or ore shoots in miniature, are likely to contain gold of variable character, but the average silver content will be low because a large proportion of the gold is "late" gold. The factors which might cause epithermal gold to have a lower fineness than mesothermal or hypothermal gold are briefly discussed. Some possible applications of this study are indicated in the final chapter. It is claimed that records of gold fineness might constitute a valuable addition to mill records. Tentative suggestions are made regarding a method whereby the approaching exhaustion of a deposit might in some cases be predicted. With regard to the origin of the gold in the Witwatersrand sediments, it is pointed out that the modified placer hypothesis is not fully equipped to explain certain of the variations in the composition of the gold.
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- Date Issued: 1961
Investigation of the formation of complexes between selected organic compounds and the chlorides and sulphates of chromium
- Authors: Ellis, Melville John
- Date: 1961
- Subjects: Organic compounds , Chromium compounds , Chlorides , Sulfates
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4466 , http://hdl.handle.net/10962/d1011744 , Organic compounds , Chromium compounds , Chlorides , Sulfates
- Description: Some properties of soluble chromium complexions containing coordinated aliphatic acids have been studied. The work falls naturally into two sections. In the first, the coordination of a series of ⊄, β and⊁amino acids by chromium chloride has been studied by physical methods. The tanning action of chromium chloride in the presence of these amino acids has also been studied. The absorption spectra of the complexes were similar to those reported previously for trivalent chromium solutions, having two pronounced maxima in the visible region. From the variations in these absorption maxima, it is suggested that the absorption maximum in the 580 m u region is influenced by coordination of the chromium with the ligand, while the maximum in the 420 m u region is also affected by the olation of the basic chromium salts. The spectrophotometric evidence indicates that raising the pH or the concentration of the ligand in the solution increases the amount of coordination, and further, that the tendency for coordination increases as the hydrocarbon chain separating the carboxyl and amino groups becomes longer. This suggests that tho stability of the complex is not dependent on chelate ring formation, but is influenced by the pK₁ value of the carboxyl group of the . ligand. Potentiometric titrations support the hypothesis that only the carboxyl group is coordinated, to an extent depending on its pK₁ value, since the curves have shown that the amino group is still free to titrate. Paper electrophoresis has shown that all the complexes prepared were cationic, indicating that the amino acids were coordinated as dipolar ions. The tanning action of the masked chromium solutions has confirmed the deductions made from the physical measurements. Increasing the amount of amino acid added to the solution lowered the chromium fixation and the hydrothermal stability of the leather, and further, that for solutions at the same pH containing the same amount of masking agent, tanning action was least for the ⊁ amino acid and greatest for the ⊄ amino acids. Comparison of the present data with the corresponding results obtained with chrome alum solutions showed that coordination of the amino acids was greater in the case of the chromium chloride solutions. The second section of the experimental work was an investigation of the coordination of substituted acetic and propionic acids by chromium chloride and chromium sulphate. Spectrophotometric and potentiometric methods were applied and the various solutions were also used in miniature tanning experiments. Certain difficulties were encountered in the preparation of some of the complexes, and it was not possible to carry the work to a point where conclusive results could be obtained. Nevertheless, the work reported suggests that chelate ring formation occurs in the coordination of hydroxy-carboxylic acids, resulting in exceptionally high stability of the complex. In the case of the other ligands, containing amino, chloro and bromo groups, as well as with acetic and propionic acids, the results suggest that coordination involves the carboxyl group only, and that the pY value of this group is an important factor determining the stability of the complexes.
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- Date Issued: 1961
The spectrochemical determination of certain minor trace elements in plant material
- Authors: Eve, Desmond John
- Date: 1961
- Subjects: Trace elements Spectrum analysis Plants -- Analysis Plants -- Effect of trace elements on Trace elements in agriculture
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4469 , http://hdl.handle.net/10962/d1011773
- Description: A study has been made of three organic complexing reagents , namely dithizone, oxine and cupferron with a view to developing suitable methods for the separation and concentration of Zn, Co, Ni, Pb, Cu, Mn, Ti , V and Mo prior to the spectrometric determination of their concentrations. In particular the influence of pH on the chloroform extraction of ditihizonates, oxinates and cupferrates from aqueous tartrate and citrate solutions and the separation of iron by oxine extraction has been investigated. The development of a method for the chemical concentration and spectrcgraphic determination of Zn, Co, Ni, Pb, Ti, V and Mo is described and the possibility of determining Nn and Cu flame photometrically as part of the analysis scheme is demonstrated. A specially designed slide rule for the calculation of spectrographic results is described. A direct reading spectrometric method for the determination of Zn, Pb and Cu in plant material is presented. The analysis of plant ash for zinc using the 2138 . 6A spectrum line has been studied and a simple, rapid analysis method is described.
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- Date Issued: 1961
A critical study of the determination of molybdenum in plant material
- Authors: Gore, William Tompson
- Date: 1961
- Subjects: Molybdenum , Plants -- Analysis , Spectrophotometry , Polarography
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4477 , http://hdl.handle.net/10962/d1012071 , Molybdenum , Plants -- Analysis , Spectrophotometry , Polarography
- Description: 1. Polarographic and spectrophotometric methods for the determination of molybdenum were reviewed. 2. The inclusion of salicylaldoxine in several supporting electrolytes was examined with a view to developing a polarographic procedure, suitable for routine analyses, which did not necessitate a preliminary time-consuming separation stage. A stable molybdenum wave was obtained from an electrolyte having a composition similar to the test solution obtained after the wet digestion of plant material. The height of the wave was found to be, over an optimum range, independent of the reagent concentrations. The wave was however distorted by a maximum, which rendered it unsuitable for quantitative analytical application. 3. The spectrophotometric procedure for molybdenum using thiocyanate is virtually specific and was examined critically. Modifications were found to improve the sensitivity of the procedure, and the stability of the chromatic compound. 4. The modified spectrophotometric procedure is recommended for the routine determination of molybdenum in plant material.
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- Date Issued: 1961