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1952 Onderstepoort Journal of Veterinary Research, Volume 25, Number 3 & 4, 1952: Recent submissions

  • Transvaalin, a cardiac glycoside isolated from Urginea burkei, Bkr. (Transvaal Slangkop) 
    Louw, P.G.J.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    (1) A cardiac glycoside, transvaalin, with molecular formula C₃₆H₅₂O₁₃, was isolated from Urginea burkei Bkr. (2) Transvaalin has the typical raticidal properties of scilliroside when dosed per os or injected ...
  • Chemical investigation of Pachystigma pygmaeum Schlechter (gousiektebossie) 
    Veldsman, D.P.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    Leaves and stems of the plant, Pachystigma pygmaeum (gousiektebossie), collected at Kaalfontein on 20th October, 1950, were subjected to a chemical investigation. Four crystalline substances were isolated: a lactone, ...
  • Digestibility of lucerne hay with special reference to experimental technique in digestion trials (second report) 
    Groenewald, J.W.; Myburgh, S.J.; Louw, J.G.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    (1) In a continuation of the study of the digestibility of the same lucerne hay by the same steers at different times further evidence of a period influence on digestibility was obtained. This influence could be reduced ...
  • The utilization of phosphorus from different sources by the rat 
    Reinach, Norman; Louw, J.G.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    An experiment has been carried out in which the relative availability to young rats of the phosphorus in bone meal, bone ash, dicalcium phosphate and tricalcium phosphate has been ascertained. Live weight gains, the ash ...
  • The influence of processing on the efficiency of proteins 
    Myburgh, S.J.; Louw, J.G.; Groenewald, J.W.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    Employing an improved nitrogen balance method the influence of mild heat treatment on the digestibility and biological value of a mixture of plant proteins has been determined. The heat treatment resulted in a small ...
  • The effect of body stores and of method of supplementation on the efficiency of calcium and phosphorus utilization by sheep 
    Reinach, Norman; Louw, J.G.; Groenewald, J.W.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    (1) The Ca and P metabolism of two groups of young sheep, depleted of these minerals, was investigated in a series of three balance studies. (2) During the first 10 days on the bone meal supplemented ration, the inorganic ...
  • The influences of the nature of the diet and of starvation on the concentration curve of sulphanilamide in the blood of sheep after oral dosing 
    Clark, R.; Wessels, J.J.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    It has been shown that the concentration curve of sulphanilamide in the blood of sheep after oral dosing is profoundly influenced by the basic diet and by starvation. In view of this and other similar findings, it is ...
  • Studies on the pharmacology and toxicology of Acovenoside A 
    Clark, R.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    It has been shown that Acovenoside A. is a typical cardio-active glycoside in both its pharmacological and toxicological actions. It is highly cumulative. either materially or functionally, and by prolonged action can ...
  • The lethal effect of some insecticides on the B.H.C.-resistant blue tick, Boophilus decoloratus Koch 
    Fiedler, O.G.H.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    D.D.T. and its related compounds seem to be the only group of the new contact insecticides against which the blue tick has not been able to build up any resistance. Toxaphene as well as Parathion are definitely less ...
  • The new synthetic insecticides as dressings tor blowfly strike in sheep 
    Du Toit, R.; Fiedler, O.G.H.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    1. The more recent literature on the blowfly problem in South Africa is reviewed and the general conclusions regarding control measures discussed. 2. The larvicidal properties of a number of the new synthetic insecticides for ...
  • A note on the staining of bacterial capsules 
    Sterne, Max; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    The efficiency of Muir's capsule stain could be much increased by adding a surface-active agent (CTAB) to the primary carbol-fuchsin stain, and by using 0•1 per cent. alkaline methylene blue as a counter stain. Heating ...
  • A note on the alkaloid of Crotalaria damarensis 
    Louw, P.G.J.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
  • Subject index 
    Anonymous; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
  • Author index 
    Anonymous; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
  • Aureomycin in the treatment of heartwater 
    Weiss, K.E.; Haig, D.A.; Alexander, R.A.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    1. The value of aureomycin in the treatment of heartwater has been established. It is considerably more effective than the sulphonamides. 2. The minimal therapeutic dose for sheep appears to be 2•5 mg. per lb. administered ...
  • Newcastle disease vaccination: the use of live virus after inactivated vaccine 
    Kaschula, V.R.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    The use is described of Beaudette's Roakin strain live virus intra-ocularly on fowls previously vaccinated with an aluminium hydroxide adsorbed formalinized chick embryo vaccine. Good response to this combination was ...
  • The domestic pigeon as a possible carrier of Newcastle disease 
    Kaschula, V.R.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    When virus was dosed per os with virulent Newcastle disease virus and daily examinations were made of virus in their pooled faeces, virus was recovered on the 12th day. No H.I antibodies were produced. The challenge ...
  • Changes in the electrophoretic pattern of sera of dogs suffering from various diseases 
    Polson, A.; Malherbe, W.D.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    The sera of dogs suffering from three diseases commonly encountered in South Africa, viz. babesiosis, rickettsiosis and distemper, have been examined electrophoretically and compared with normal sera. Diagrams of the ...
  • Comparative electrophoretic studies of bovine and human colostrum in relation to neonatal immunity 
    Polson, A.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    Since there is no reason to doubt the generally accepted conception that the concentration of ƴ globulins is an accurate index of humoral immunity, it may be concluded that in bovines there is no transplacental ...
  • The occurrence of Eperythrozoon parvum Splitter, 1950 in South African swine 
    Jansen, B.C.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    (1) The presence of Eperythrozoon parvum in a splenectomised pig at Onderstepoort is recorded. (2) Preliminary studies on the transmission of this parasite suggest that Haematopinus suis may be a vector.