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Some aspects of the reproductive endocrinology of the catfish, Clarias Gariepinus (Burchell, 1822)

- Rennie, Susan Elizabeth

  • Authors: Rennie, Susan Elizabeth
  • Date: 1981
  • Subjects: Catfishes Clarias gariepinus
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5339 , http://hdl.handle.net/10962/d1005924
  • Description: A description is given of the location, anatomy and morphology of the endocrine glands likely to be involved in controlling the reproductive cycle of C. gariepinus. Methods of identifying the secretory tissues in the light and electron microscopes are outlined. A review of the published results on homologous tissues from other teleosts is included and directions for further research on the endocrinology of C. gariepinus are discussed.
  • Full Text:
  • Date Issued: 1981

Song with Inkinge

- Four Young Boys, Composer Not Specified, Dargie, Dave

South Africa, the prospects of peaceful change: an empirical enquiry into the possibility of democratic conflict regulation

- Hanf, Theodor, 1936-, Weiland, Heribert, 1942-, Vierdag, Gerda, Schlemmer, Lawrence 1936-2011, Hampel, Rainer, Krupp, Burkhard, Richardson, John, Orkin, Mark

  • Authors: Hanf, Theodor, 1936- , Weiland, Heribert, 1942- , Vierdag, Gerda , Schlemmer, Lawrence 1936-2011 , Hampel, Rainer , Krupp, Burkhard , Richardson, John , Orkin, Mark
  • Date: 1981 , 2021
  • Subjects: South Africa Race relations , South Africa Politics and government 1961-1978
  • Language: English
  • Type: Book , text
  • Identifier: http://hdl.handle.net/10962/179720 , vital:43164
  • Description: Our aim in this book is not to tell black or white South Africans what they ought to do. Rather, we try to establish through empirical social research what the various groups would like to do, and what they are in fact able to do. The overall issue which we consider is whether conflict can be regulated both peacefully and democratically. The events of 1976 and 1977 established beyond doubt that conflict exists on a large scale in South Africa. The conflict is both open and latent. Its causes include the distribution of income and wealth between different groups, the enforced social segregation of the groups from each other, and the monopoly of power by one of the groups. This one group has used and continues to use its power to regulate the conflict, and does so unilaterally and towards its own ends. Now conflict can be regulated in this way for a considerable period of time—longer than the whites dare hope and the blacks concede. But it is unlikely that power can be exercised indefinitely without the consent of the majority. Indeed, the longer a group exercises power without consent, the more likely is violent change. Given the distribution of power in contemporary South Africa, violent change would involve enormous sacrifices all round. So we consider the chances of peaceful change. Unfortunately, the chances seem slim. A glance at history shows that minorities tend to cling obstinately to their privileges, and then lose everything in defending them. One is far less likely to find minorities who have made timely sacrifices of some things in order to hold onto others. Similarly, once the tables are turned, the majorities that have been exploited and maltreated more often give vent to their long-suppressed feelings of hate and revenge than explore the possibilities for a peaceful take-over of power. Even so, however likely such developments may be when seen from a historical perspective, there is no ‘iron law of history’ which categorically excludes the possibility of peaceful change under the conditions obtaining in South Africa. And the ‘social costs’—a euphemism in social science for human suffering—of violent change are so high that one is surely justified in exploring the constraints, however narrow they might be, within which the current system of conflict regulation in South Africa might be peacefully transformed. This consideration is even more important in the present global political situation; for change by violent means will not only endanger the parties directly concerned, but may also endanger the peace of the African continent and perhaps that of the rest of the world. We also want to know whether conflict can be regulated democratically. We assume that the rule of law, social justice, and democratic rights are not the prerogatives of wealthy Western states. We believe that all the members of a society should be able to decide freely on how they want to shape their economic, cultural, and political coexistence. This study is thus motivated by a specific interest: we want to ascertain what scope there is in contemporary South Africa for changing the existing system of domination, so as to allow the democratic regulation of conflict, more social justice, a greater diversity of cultural expression, and wider freedom for all South Africans. We stress that we are concerned with the democratic regulation of conflict. For this purpose, the context in which conflict originated in South Africa is only relevant to the extent that it may still influence the present situation. Similarly, explanations of the phenomenon of conflict will be relevant only if they let us formulate more precisely the problem of how conflict may be peacefully and democratically regulated. This problem is important not because it contributes to the progress of social science—that contribution may be modest—but because it bears on the fate of many human beings. We have tried to offer answers which can be supported by empirical inquiry. Although the literature on conflict regulation in South Africa has expanded rapidly in recent years, it is characterized by a lack of empirical data on the attitudes and opinions of the groups and individuals involved in the political process. We felt it would be useful if we lessened these gaps in our knowledge by empirical means. But data on the attitudes and opinions of black and white South Africans are hardly a sufficient basis for reliable predictions about South Africa’s future. Events in South Africa will not only be determined by the opinions and wishes of its inhabitants but also, as is becoming increasingly evident, by forces and influences outside the country. However, the latter have been expressly excluded from the present study; it is concerned, ceteris paribus, with internal South African developments. But even with respect to internal developments, what actually happens in a society is only partly determined by what the members of the society think and want. It would thus be foolhardy to base a comprehensive prognostication on opinion surveys alone. On the other hand, empirical surveys may facilitate a precise answer to the overall problem we have set ourselves. Empirical research can indicate how far white South Africans are prepared for peaceful change and democratic conflict regulation, and similarly, what change black South Africans expect and what means of conflict regulation they are prepared to accept. Does the preparedness of the whites match or fall far short of the expectations of the blacks? The question is crucial to change without violence. Thus, in respect of our motivation and of the limitations we have set on the nature of our inquiry, this study must be seen as an empirical contribution to research into conflict and peace.
  • Full Text:
  • Date Issued: 1981

Speech Day Address, Port Shepstone High School, Wednesday, 11 November I981

- Henderson, Derek Scott

  • Authors: Henderson, Derek Scott
  • Date: 1981
  • Language: English
  • Type: text
  • Identifier: vital:7440 , http://hdl.handle.net/10962/d1018317
  • Full Text:
  • Date Issued: 1981

Studies on an autolysin produced by clostridium acetobutylicum

- Webster, Jocelyn Rowena

  • Authors: Webster, Jocelyn Rowena
  • Date: 1981
  • Subjects: Clostridium acetobutylicum , Autolysis , Bacteriocins , Proteins -- Synthesis , DNA -- Synthesis , RNA -- Synthesis
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:3893 , http://hdl.handle.net/10962/d1003724
  • Description: An extracellular bacteriocin-like substance produced by Clostridium acetobutylicum was detected during studies on an industrial fermentation process. The bacteriocin-like substance was not inducible by either ultraviolet light or mitomycin C, and its production was not associated with the induction of a protease. Studies on the mode of action of the bacteriocin-like substance indicated that it had no significant effect on DNA, RNA, or protein synthesis, and it did not cause the loss of intracellular ATP. However, the bacteriocin-like substance was able to lyse SDS-treated cells and cell walls of C. acetobutylicum and was identified as an autolysin. Some of the characteristics of this extracellular autolysin were determined, and after purification it was shown to be a glycoprotein with a molecular weight of 28 000.
  • Full Text:
  • Date Issued: 1981

Sung prayer and response

- St Patrick's Church Congregation, Composer not specified, Dargie, Dave

Tanga nokufumadeka Hompa

- Tondoro school children, Kasiona, Theresiana, Bunya workshop participants, Dargie, Dave

Tani ku zigida

- Rundu music workshop participants, Composer not specified, Dargie, Dave

Tani Tongonona

- Tondoro school children, Tondoro music workshop participants, Kasiona, Theresiana, Haupindi, L., Haimbili, G., Sitarara, T., Dargie, Dave

Tertiary phonolite volcanism in the Klinghardt Mountains of South West Africa/Namibia

- Marsh, Julian S, Lock, B E

  • Authors: Marsh, Julian S , Lock, B E
  • Date: 1981
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/133242 , vital:36953 , https://hdl.handle.net/10520/AJA10120750_2789
  • Description: The Klinghardt Mountains in South West Africa (Namibia) were the site of an important volcanic outburst late in the Eocene or early in the Oligocene. Over a hundred endogenous domes and several lava flows of the coulee type were emplaced: all analysed samples (more than 60) comprise varieties of phonolite. A sequence of ash-flow tuffs of limited areal extent is present on Glasrucken.
  • Full Text:
  • Date Issued: 1981

Thanda

- St George's Church Choir, Composer Not Specified, Dargie, Dave

Thanda umelwane

- St Patrick's congregation, Composer not specified, Dargie, Dave

Thanda umelwane wako

- St George's Church Choir, Composer not specified, Dargie, Dave

Thanda ummelwane

- Lumko church music workshop participants of 1979, Dargie, Dave

That is my water - don't drink my water

- Catholic church Gobabis No. II music workshop participants, Composer unknown, Dargie, Dave

The church music of Felix Mendelssohn-Bartholdy :|ban investigation into formal and stylistic aspects of his organ and sacred choral works

- Johnson, Bruce Richard

The Church Prayer

- Lumko Church Choir, Composer Not Specified, Dargie, Dave

The Church Prayer

- Lumko Church Choir, Composer Not Specified, Dargie, Dave

The comparative bioavailability and in vitro assessment of solid oral dosage forms of paracetamol

- Braae, Karen

  • Authors: Braae, Karen
  • Date: 1981 , 2013-04-02
  • Subjects: Acetaminophen , Bioavailability , Drugs -- Bioavailability , Drugs -- Dosage forms , Analysis of variance
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:3827 , http://hdl.handle.net/10962/d1006288 , Acetaminophen , Bioavailability , Drugs -- Bioavailability , Drugs -- Dosage forms , Analysis of variance
  • Description: The dissolution profiles of eight lots of paracetamol tablets representing seven different tablet brands are determined in a USP rotating basket assembly and a stationary basket-rotating paddle apparatus. The in vitro data are expressed in terms of dissolution parameters and inter-tablet differences are assessed statistically using analysis of variance (ANOVA) and the Scheffe test. Highly significant differences are observed between a number of the tablets at the 95% confidence level. Representative tablets from the dissolution rate study and a control dose of paracetamol dissolved in water are subsequently investigated in a 4 x 4 latin square design bioavailability trial. Serum and urine samples are collected and assayed for paracetamol alone (serum) and together with its metabolites (urine) by means of high pressure liquid chromatography. The in vivo data are expressed in terms of bioavailability parameters and differences between the test doses are assessed by means of ANOVA. No significant differences are observed between the dosage forms at the 95% confidence level.
  • Full Text:
  • Date Issued: 1981

The determination of God's action in history with special reference to Herbert Butterfield

- Fourie, Stephen

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