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Regional geochemistry of the Karoo igneous province

- Duncan, Andrew R, Erlank, Anthony J, Marsh, Julian S

  • Authors: Duncan, Andrew R , Erlank, Anthony J , Marsh, Julian S
  • Date: 1984
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/134154 , vital:37079 , https://inis.iaea.org/search/searchsinglerecord.aspx?recordsFor=SingleRecordamp;RN=15001076
  • Description: The extrusive and intrusive rocks of the Karoo Igneous Province are dominantly of basaltic or rhyolitic (sensu lato) composition. There are, however, a considerable variety of other rock types within the province including picritic basalts, nephelinites, shoshonites, latites, andesites and dacites. This paper deals with the geochemistry of the Karoo igneous province.
  • Full Text:
  • Date Issued: 1984

Resource partitioning by top predatory teleosts in eastern Cape coastal waters (South Africa)

- Smale, Malcolm J

  • Authors: Smale, Malcolm J
  • Date: 1984
  • Subjects: Osteichthyes -- Nutrition Osteichthyes -- Behavior
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5210 , http://hdl.handle.net/10962/d1004775
  • Description: A detailed feeding study of eleven inshore top predatory teleosts in the eastern Cape is presented. Material collected largely from line-caught fish was augmented by spearfishing. The predators were grouped according to habitat: pelagic, soft-sediment demersal and reef species. Pelagic fish examined were Lichia amia, Pomatomus saltatrix, Seriola lalandi, Atractoscion aequidens, Katsuwonus pelamis and Thunnus albacares. Stomach content analyses revealed that their prey varied according to size and between species. In coastal areas important prey species were Sardinops ocellata, Etrumeus teres, Engraulis capensis and Loligo reynaudi. The use of fish otoliths and squid beaks allowed accurate identification of the prey and their measurement provided details of their size composition. This has provided greater insight into the distribution of prey species and their importance in food webs. The principal large predator of shallow coastal soft substrates is Argyrosomus hololepidotus, which takes pelagic and demersal prey. Important prey of small specimens are mysids, whereas fish and squid become more important in the diet of larger specimens (>300 mm). Fish prey include Sardinops ocellata, Engraulis capensis, Pomadasys olivaceum and A. hololepidotus. Loligo reynaudi is the dominant cephalopod prey. Selectivity of A. hololepidotus was investigated. Prey were compared to catches made during a small-mesh trawl survey. The absence of certain species from the diet suggests that they avoid predation, possibly by outswimming A. hololepidotus (e.g. P. saltatrix) while large Galeichthys feliceps are rare in the diet, probably because of their formidable spines. Flatfishes, P. olivaceum, juvenile G. feliceps and small A. hololepidotus appear to be preferred food items. The depth distribution of predators and prey is described, and it appears that the distribution of predators may be influenced by their prey. Top predatory teleosts inhabiting coastal reefs are Cheimerius nufar, Petrus rupestris, Polysteganus praeorbitalis and Epinephelus guaza. Diet changes with size and locality but comprises small reef fishes for most of the sparids. C. nufar takes pelagic fish and squid more than the other predators while P. rupestris and P. praeorbitalis prey on cheilodactylids, clinids and other reef associated prey predominantly. E. guaza takes principally crabs and octopods. Classification and ordination analyses of the prey taken illustrated the inter-relationships of predators, which change with increasing size. The pelagic predators are most similar to each other and A. hololepidotus is closer to this group than to reef predators. The reef predators are less similar to each other, although this group as a whole is segregated from pelagic predators. Exceptions to this are large C. nufar and large P. praeorbitalis, which fall into the pelagic predator group, as they took pelagic prey to a large extent. These results are discussed and the patterns shown are compared to other studies and current resource partitioning theory. Two food webs are provided for the coastal waters of the eastern Cape. The pelagic food web has clupeids, engraulids and L. reynaudi as principal components. The reef system is more complex and the Clinidae, Cheilodactylidae and Octopus spp. are important. The use of food webs in management and in providing a framework for testing theoretical models is shown to be important. Research needs are identified and include more detailed work on the basic biology and ecology of the top predators and their prey.
  • Full Text:
  • Date Issued: 1984

Rev John Edwards - Letter from Rev N B Kok to Dr Hewson

- Kok, N B

  • Authors: Kok, N B
  • Date: 1984
  • Subjects: Edwards, John (1804-1887) , Methodist Church -- Missions -- South Africa , South Africa -- Church history
  • Type: Text
  • Identifier: http://hdl.handle.net/10962/19394 , vital:22439 , MS 20 003 , This letter 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: Letter from Rev. N B Kok, the Superintendent Minister, Methodist Church, Graaff-Reinet Circuit, to Dr. Hewson. The letter, dated 29 March 1884, accompanied a picture of Rev. John Edwards (available: http://hdl.handle.net/10962/19428) who was instrumental in establishing of Methodism in the area. Transcription: [Letter dated] 29 March 1984 Dear Dr. Hewson Herewith the print of our Methodist founding father in Graaff-Reinet. He made a very significant contribution to the establishment of Methodism in these parts, both spiritually and materially. The name is still being given to infants, only last year I baptised what must have been a great, great, great grandson of the venerable “John Edwards” by that name in John Edwards Hobson. Trusting that the print is up to standard required. The cost of the same is R10-. We had it done at a place call Reinet Studios here in Graaff-Reinet. Greetings [signed] Rev N.B. Kok.
  • Full Text: false
  • Date Issued: 1984

Rhodes University 1984 Graduation Ceremonies Address

- Henderson, Derek Scott

  • Authors: Henderson, Derek Scott
  • Date: 1984
  • Language: English
  • Type: Text
  • Identifier: vital:7464 , http://hdl.handle.net/10962/d1018341
  • Full Text:
  • Date Issued: 1984

Rhodes University accomodation

  • Date: 1984
  • Subjects: Rhodes University -- History , Rhodes University -- Employees , Rhodes University -- Employees -- Housing
  • Type: Image
  • Identifier: http://hdl.handle.net/10962/40266 , vital:24966 , PIC/M 5516 , 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: 1984

Rhodes University Annual Report 1984

- Rhodes University

Rhodes University Graduation Ceremony 1984

- Rhodes University

  • Authors: Rhodes University
  • Date: 1984
  • Language: English
  • Type: text
  • Identifier: vital:8115 , http://hdl.handle.net/10962/d1004573
  • Description: Rhodes University Graduation Ceremonies on Friday, 13 April 1984 at 8 p.m. [and] on Saturday, 14 April 1984 at 10 a.m. in the 1820 Settlers National Monument.
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  • Date Issued: 1984

Rorisang Morena

- Performer not specified, Composer Not Specified, Dargie, Dave

Rorisang Morena

- Performer not specified, Composer Not Specified, Dargie, Dave

Rorisang Morena ka di tsatsi

- Workshop particpants, Ramashamole, Napo

  • Authors: Workshop particpants , Ramashamole, Napo
  • Date: 1984
  • Subjects: Folk music , Field recordings , Africa, Sub-Saharan , Africa Lesotho Roma lo
  • Language: English , Sesotho
  • Type: sound recordings , field recordings , sound recording-musical
  • Identifier: http://hdl.handle.net/10962/328955 , vital:61282 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DDC314a-01
  • Description: Group composition workshop performance accompanied drums and clapping
  • Full Text: false
  • Date Issued: 1984

Sanctus

- Zola Choir, Jouberton Marimbas, Dargie, Dave

  • Authors: Zola Choir , Jouberton Marimbas , Dargie, Dave
  • Date: 1984
  • Subjects: Folk music , Field recordings , Africa, Sub-Saharan , Africa South Africa Soweto f-sa
  • Language: Xhosa
  • Type: sound recordings , field recordings , sound recording-musical
  • Identifier: http://hdl.handle.net/10962/290474 , vital:56752 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DD082-12
  • Description: Sunday Mass hymn at Zondi, Soweto with marimba accompaniment.
  • Full Text: false
  • Date Issued: 1984

Sanctus

- Group at St Augustine's Seminary Workshop, Composer Not Specified0, Dargie, Dave

Sanctus

- Group at St Augustine's Seminary Workshop, Rampano, John, Manyeli, Louis, Dargie, Dave

Sanctus

- St Patricks' Church Choir, Nyakanyaka, D., Dargie, Dave

Sanctus

- St Patricks' Church Choir, Dlangamandla, Umlamli, Dargie, Dave

Sele

- Zola Choir, Jouberton Marimbas, Composer Not Specified, Dargie, Dave

Sele Ahom

- Mixed Church Choir and Queenstown Cathedral Congregation, Composer Not Specified, Dargie, Dave, Huwiler, Kurt

Sele Ahom

- Choir at Bishop Lenhof's Ordination, Composer not specified, Dargie, Dave, Hodgson, Janet

Serotonin binding in vitro by releasable proteins from human blood platelets

- Heemstra, Valerie Lawrence

  • Authors: Heemstra, Valerie Lawrence
  • Date: 1984 , 2013-04-10
  • Subjects: Serotonin , Serotonin -- Metabolism
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:3829 , http://hdl.handle.net/10962/d1007215 , Serotonin , Serotonin -- Metabolism
  • Description: Among the substances released from human blood platelets are serotonin and various proteins. It was hypothesized that one of these proteins binds serotonin and that serotonin might be important to the protein's function or that the protein might be important to serotonin's function. Two platelet-specific proteins, platelet factor 4 (PF4) and ß-thromboglobulin ( ßTG) were found to bind serotonin in vitro. Endogenous PF4 was isolated by serotonin-affinity chromatography and was identified by radioimmunoassay. Purified l¹²⁵ I] -PF4 and native PF4 bound to and eluted from a serotonin-affinity column similarly. Ultrafiltration of the homologous protein, (ßTG, with [¹⁴C]-serotonin demonstrated binding of about 8 moles serotonin per mole tetrameric ßTG with a dissociation con stant of about 4 x 10-8ThesisThesis⁻⁸ M. Equilibrium dialysis of PF4 with radiolabelled serotonin was attempted, but no binding constant values were obtained because serotonin apparently bound to the dialysis membrane. Since EDTA was one of the two agents that eluted PF4 from the serotonin-affinity gel, calcium binding by -PF4 was investigated by equilibrium dialysis. Evidence was obtained for positively cooperative binding of calcium ions by PF4. It is concluded that PF4 and ßTG bind serotonin in vitro, that they may also bind in vivo when platelets undergo release, and that the functions of serotonin, PF4 and ßTG may be mediated in part by serotonin-protein associations. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
  • Full Text:
  • Date Issued: 1984

Sibulela kuThixo Halelu haleluya

- Queenstown Roman Catholic Cathedral ordination choir of 1984, Composer not specified, Dargie, Dave

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