Ontological commitment and mathematics : inaugural lecture delivered at Rhodes University
- Authors: Schutte, H J
- Date: 1969
- Subjects: Mathematics -- Philosophy
- Language: English
- Type: Text
- Identifier: vital:666 , http://hdl.handle.net/10962/d1020735
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1969
- Authors: Schutte, H J
- Date: 1969
- Subjects: Mathematics -- Philosophy
- Language: English
- Type: Text
- Identifier: vital:666 , http://hdl.handle.net/10962/d1020735
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1969
Order into chaos : inaugural lecture delivered at Rhodes University
- Authors: Glasser, Leslie
- Date: 1969
- Subjects: Force and energy , Entropy
- Language: English
- Type: Text
- Identifier: vital:630 , http://hdl.handle.net/10962/d1020699
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1969
- Authors: Glasser, Leslie
- Date: 1969
- Subjects: Force and energy , Entropy
- Language: English
- Type: Text
- Identifier: vital:630 , http://hdl.handle.net/10962/d1020699
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1969
Oriel Hall House Committee 1969, Gail Martin in front row
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17260 , vital:22231 , PIC/M 6810
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17260 , vital:22231 , PIC/M 6810
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Oriel Hall leaver's dinner high table, 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17307 , vital:22234 , PIC/M 6811
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17307 , vital:22234 , PIC/M 6811
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Oriel Hall leaver's dinner high table, 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17285 , vital:22233 , PIC/M 6812
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17285 , vital:22233 , PIC/M 6812
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Oriel House photograph with Gail Martin in the front row, 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17367 , vital:22241 , PIC/M 6816
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17367 , vital:22241 , PIC/M 6816
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Oriel House setting out for Rag procession, 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs Rhodes University -- Rag -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17384 , vital:22243 , PIC/M 6817
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs Rhodes University -- Rag -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17384 , vital:22243 , PIC/M 6817
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Patti Batchelor in costume during Rag week, 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs Rhodes University -- Rag -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17400 , vital:22244 , PIC/M 6818
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs Rhodes University -- Rag -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17400 , vital:22244 , PIC/M 6818
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Pharmacy float Huffer Puffer, Rag week 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs Rhodes University -- Rag -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17463 , vital:22250 , PIC/M 6822
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs Rhodes University -- Rag -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/17463 , vital:22250 , PIC/M 6822
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Ray tracing at very low frequencies when the effects of heavy ions are considered
- Authors: Terry, Patrick D.
- Date: 1969
- Subjects: Ionospheric radio wave propagation , Ionosphere -- Graphic methods , Ray tracing algorithms
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5542 , http://hdl.handle.net/10962/d1013350
- Description: The behaviour of very low frequency (V.L.F.) radio waves propagating in an ionlzed medium, such as the ionosphere and exosphere, may exhibit markedly different characteristics from those of frequencies such as are used for communication in the short-wave bands. The anisotropy introduced into the medium by the presence of the earth's magnetic field has a significant effect, while at frequencies below about 5KHz the presence of heavy positive ions may further affect propagation. In particular it is found that, under suitable conditions, V.L.F. signals may propagate along paths closely following the lines of force of the earth's magnetic field. The study of such signals has a practical interest in that, from consideration of their propagation times and dispersion properties, they can provide an inexpensive method of determining electron densities at well beyond the range of satellite investigation. For this reason, if for no other, theoretical investigation of the paths traced in a model exosphere may indicate how closely the model exosphere approximates the true one. A powerful method of tracing out these paths is by the use of "ray-tracing", provided the properties of the medium vary slowly in space, a condition not always fulfilled in practice. It has been the subject of this thesis to carry out ray-tracing studies, in particular noting the effects of the positive ions in the exosphere; effects which have not received much notice before as they were thought to be unimportant. Intro., p. 1-2.
- Full Text:
- Date Issued: 1969
- Authors: Terry, Patrick D.
- Date: 1969
- Subjects: Ionospheric radio wave propagation , Ionosphere -- Graphic methods , Ray tracing algorithms
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5542 , http://hdl.handle.net/10962/d1013350
- Description: The behaviour of very low frequency (V.L.F.) radio waves propagating in an ionlzed medium, such as the ionosphere and exosphere, may exhibit markedly different characteristics from those of frequencies such as are used for communication in the short-wave bands. The anisotropy introduced into the medium by the presence of the earth's magnetic field has a significant effect, while at frequencies below about 5KHz the presence of heavy positive ions may further affect propagation. In particular it is found that, under suitable conditions, V.L.F. signals may propagate along paths closely following the lines of force of the earth's magnetic field. The study of such signals has a practical interest in that, from consideration of their propagation times and dispersion properties, they can provide an inexpensive method of determining electron densities at well beyond the range of satellite investigation. For this reason, if for no other, theoretical investigation of the paths traced in a model exosphere may indicate how closely the model exosphere approximates the true one. A powerful method of tracing out these paths is by the use of "ray-tracing", provided the properties of the medium vary slowly in space, a condition not always fulfilled in practice. It has been the subject of this thesis to carry out ray-tracing studies, in particular noting the effects of the positive ions in the exosphere; effects which have not received much notice before as they were thought to be unimportant. Intro., p. 1-2.
- Full Text:
- Date Issued: 1969
Rhodes University campus carnival, 1969
- Date: 1969
- Subjects: Rhodes University -- Rag -- Photographs Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/39946 , vital:24937 , PIC/M 6831
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- Rag -- Photographs Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/39946 , vital:24937 , PIC/M 6831
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Rhodes University Graduation Ceremony 1969
- Authors: Rhodes University
- Date: 1969
- Language: English
- Type: text
- Identifier: vital:8104 , http://hdl.handle.net/10962/d1004554
- Description: Rhodes University Graduation Ceremony on Friday 11th April 1969 at 8 p.m. [and] on Saturday 12th April 1969 at 10:30 a.m.in the University Great Hall.
- Full Text:
- Date Issued: 1969
- Authors: Rhodes University
- Date: 1969
- Language: English
- Type: text
- Identifier: vital:8104 , http://hdl.handle.net/10962/d1004554
- Description: Rhodes University Graduation Ceremony on Friday 11th April 1969 at 8 p.m. [and] on Saturday 12th April 1969 at 10:30 a.m.in the University Great Hall.
- Full Text:
- Date Issued: 1969
Rhodes University Gymnastics club with Gail Martin in the front row, 1969
- Date: 1969
- Subjects: Rhodes University -- Sports -- Photographs Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/39976 , vital:24939 , PIC/M 6833
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- Sports -- Photographs Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/39976 , vital:24939 , PIC/M 6833
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Rhodes University Gymnastics Committee, 1969
- Date: 1969
- Subjects: Rhodes University -- Sports -- Photographs Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/40054 , vital:24948 , PIC/M 6836
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- Sports -- Photographs Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/40054 , vital:24948 , PIC/M 6836
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Rhodes University Physical Education Department, 1969
- Date: 1969
- Subjects: Rhodes University -- Sports -- Photographs Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/40073 , vital:24950 , PIC/M 6837
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- Sports -- Photographs Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/40073 , vital:24950 , PIC/M 6837
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Rhodes University Scope Nite 1969, possibly Down and the Lady Wardens
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/40094 , vital:24952 , PIC/M 6840
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/40094 , vital:24952 , PIC/M 6840
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Rhodes University Scope Nite 1969, Rhodes and Juliet
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/40084 , vital:24951 , PIC/M 6839
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
- Date: 1969
- Subjects: Rhodes University -- History -- Photographs Rhodes University -- Students -- Photographs
- Type: Image
- Identifier: http://hdl.handle.net/10962/40084 , vital:24951 , PIC/M 6839
- Description: This image 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.
- Full Text: false
- Date Issued: 1969
Salix babylonica - Weeping willow
- Authors: Skead, C J (Cuthbert John)
- Date: 1969
- Subjects: Salix babylonica -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , notes
- Identifier: http://hdl.handle.net/10962/120148 , vital:34853
- Description: Caption "from. Tylor, Margaret Stewart. 1969. St. Helena, Ocean Roadhouse. Robert Hale, London. 'Guide to St. Helena' 1851."
- Full Text: false
- Date Issued: 1969
- Authors: Skead, C J (Cuthbert John)
- Date: 1969
- Subjects: Salix babylonica -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , notes
- Identifier: http://hdl.handle.net/10962/120148 , vital:34853
- Description: Caption "from. Tylor, Margaret Stewart. 1969. St. Helena, Ocean Roadhouse. Robert Hale, London. 'Guide to St. Helena' 1851."
- Full Text: false
- Date Issued: 1969
Some aspects of the ecology of the citrus red mite, Panonychus citri (McGregor), in the Eastern Cape Province
- Authors: Keetch, D P
- Date: 1969
- Subjects: Citrus -- Diseases and pests -- South Africa -- Eastern Cape Plant mites -- Ecology -- South Africa Citrus red mite Citrus red mite -- Ecology
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5860 , http://hdl.handle.net/10962/d1012630
- Description: The citrus red mite, Panonychus citri (McGregor), is a relatively new pest to South African citriculture, the first recorded injury to citrus trees was from Rustenberg, Transvaal in 1950 (Smith 1953). In the U.S.A. the biology of this mite has been studied by Quayle (1938), Prendergast (1938), English and Turnipseed (1941), DeBach (1947), DeBach et al. (1950), Ebeling (1959) and Jeppson et al. (1957,1961). However, in South Africa little information is available concerning the ecolopy of the citrus red mite. The majority of the literature pertaining to P. citri in Republic, (Smith (1953), Mentz (1954), Stofberg (1959), Schwartz (1965) and Brodrick (1965) is of a descriptive nature, and mainly concerned with the chemical control of the mite. The only biological investigation on the development of P.citri, and the effect of insecticides and insect predators on its biology, under South African conditions, was made by van Rooyen (1966) at Zebediela, Transvaal. In the control of citrus pests, such as the citrus red mite, that need for a better understanding of their ecology has been well emphasised by DeBach (1951) and Griffiths (1951). DeBach (1951) in particular, stressed the danger of the continued reliance on insecticidal treatment as the only method of nest control, and has pointed out that persistent chemical applications may only serve to intensify the pest problem. He has suggested that a closer study of the environment of the pest species could provide a solution to the problems now encountered as a result of insecticidal control measures. Intro., p. 1-2.
- Full Text:
- Date Issued: 1969
- Authors: Keetch, D P
- Date: 1969
- Subjects: Citrus -- Diseases and pests -- South Africa -- Eastern Cape Plant mites -- Ecology -- South Africa Citrus red mite Citrus red mite -- Ecology
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5860 , http://hdl.handle.net/10962/d1012630
- Description: The citrus red mite, Panonychus citri (McGregor), is a relatively new pest to South African citriculture, the first recorded injury to citrus trees was from Rustenberg, Transvaal in 1950 (Smith 1953). In the U.S.A. the biology of this mite has been studied by Quayle (1938), Prendergast (1938), English and Turnipseed (1941), DeBach (1947), DeBach et al. (1950), Ebeling (1959) and Jeppson et al. (1957,1961). However, in South Africa little information is available concerning the ecolopy of the citrus red mite. The majority of the literature pertaining to P. citri in Republic, (Smith (1953), Mentz (1954), Stofberg (1959), Schwartz (1965) and Brodrick (1965) is of a descriptive nature, and mainly concerned with the chemical control of the mite. The only biological investigation on the development of P.citri, and the effect of insecticides and insect predators on its biology, under South African conditions, was made by van Rooyen (1966) at Zebediela, Transvaal. In the control of citrus pests, such as the citrus red mite, that need for a better understanding of their ecology has been well emphasised by DeBach (1951) and Griffiths (1951). DeBach (1951) in particular, stressed the danger of the continued reliance on insecticidal treatment as the only method of nest control, and has pointed out that persistent chemical applications may only serve to intensify the pest problem. He has suggested that a closer study of the environment of the pest species could provide a solution to the problems now encountered as a result of insecticidal control measures. Intro., p. 1-2.
- Full Text:
- Date Issued: 1969
Static and ultrasonic elastic moduli of wool, mohair and kemp fibres
- Authors: King, Neville Edwin
- Date: 1969
- Subjects: Moduli theory , Mohair , Wool
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5528 , http://hdl.handle.net/10962/d1012640 , Moduli theory , Mohair , Wool
- Description: Fibres used in textiles can be classified broadly into natural fibres and synthetic fibres. Natural fibres can be either animal, such as wool, mohair and camel hair, or vegetable such as cotton, flax and hemp. In the development of synthetic fibres numerous polymers have emerged which have no real natural counterpart and are unique in their mechanical and chemical behaviour. Often the synthetic counterpart of a natural fibre has properties with certain advantages from the textile point of view, but, simultaneously, may exhibit other properties which have disadvantages. Nylon 6 and nylon 6-6, for exemple, are extremely strong and generally easier to dye than animal fibres. On the other hand, they absorb relatively little water vapour and therefore do not give the buffering action characteristic of hygroscopic fibres, once they are woven or knitted into cloth. All textile fibres belong to the chemical class of polymers, i.e. they are made up of repeating molecular units which are linked together to form long chains. In wool the chains are made up of amino-acids which cluster together to form protein chains. Three of these protein chains, coil around each other to form what is termed a proto-fibril. The proto-fibrils make up the micro-fibrils, each of these consisting of eleven of the three chain proto-fibrils. The micro-fibrils, in turn, pack together in bundles which run parallel to the length of the wool fibre and are termed macro-fibrils. Sulphur rich amino-acids fill up the spaces between the micro-fibrils forming a matrix which binds the system into a continuous material. Intro., p. 1.
- Full Text:
- Date Issued: 1969
- Authors: King, Neville Edwin
- Date: 1969
- Subjects: Moduli theory , Mohair , Wool
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5528 , http://hdl.handle.net/10962/d1012640 , Moduli theory , Mohair , Wool
- Description: Fibres used in textiles can be classified broadly into natural fibres and synthetic fibres. Natural fibres can be either animal, such as wool, mohair and camel hair, or vegetable such as cotton, flax and hemp. In the development of synthetic fibres numerous polymers have emerged which have no real natural counterpart and are unique in their mechanical and chemical behaviour. Often the synthetic counterpart of a natural fibre has properties with certain advantages from the textile point of view, but, simultaneously, may exhibit other properties which have disadvantages. Nylon 6 and nylon 6-6, for exemple, are extremely strong and generally easier to dye than animal fibres. On the other hand, they absorb relatively little water vapour and therefore do not give the buffering action characteristic of hygroscopic fibres, once they are woven or knitted into cloth. All textile fibres belong to the chemical class of polymers, i.e. they are made up of repeating molecular units which are linked together to form long chains. In wool the chains are made up of amino-acids which cluster together to form protein chains. Three of these protein chains, coil around each other to form what is termed a proto-fibril. The proto-fibrils make up the micro-fibrils, each of these consisting of eleven of the three chain proto-fibrils. The micro-fibrils, in turn, pack together in bundles which run parallel to the length of the wool fibre and are termed macro-fibrils. Sulphur rich amino-acids fill up the spaces between the micro-fibrils forming a matrix which binds the system into a continuous material. Intro., p. 1.
- Full Text:
- Date Issued: 1969