Browsing 1949 Onderstepoort Journal of Veterinary Science and Animal Industry, Volume 22, Number 2, 1949 by Title
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Browsing 1949 Onderstepoort Journal of Veterinary Science and Animal Industry, Volume 22, Number 2, 1949 by Title
Now showing items 1-17 of 17
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(Pretoria : The Government Printer, 1949)1. Senecio bupleuroides contains the same two alkaloids as Senecio retrorsus and Senecio isatideus, viz. retrorsine and isatidine. 2. The quantities of these alkaloids extractable from the dried plant, collected in the ...
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(Pretoria : The Government Printer, 1949)1. Senecio paucicalyculatus has been examined for toxic alkaloids. 2. Three alkaloids, viz. retrorsine, isatidine and a new alkaloid, paucicaline, have been isolated. 3. Paucicaline, probably C₁₈H₂₇O₈N, melts at ...
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(Pretoria : The Government Printer, 1949)
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(Pretoria : The Government Printer, 1949)
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(Pretoria : The Government Printer, 1949)1. The active cardiac principle of Urginea rubella Baker has been isolated. Analysis points to the empirical formula C₃₆H₁₈O₁₆. The name suggested for this compound is "rubellin". Rubellin melts at 261-3°C. with decomposition ...
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(Pretoria : The Government Printer, 1949)1. The alkaloid contained in Nicotiana glauca has been extracted and found to consist largely of optically inactive anabasine. It is of interest to note that anabasine from Anabasis aphylla is strongly laevo-rotatory, and ...
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(Pretoria : The Government Printer, 1949)Sheep treated at Onderstepoort with emulsions containing 5 per cent. and 2•5 per cent. para para isomer of D.D.T. on selected sites on the fleece, and subsequently tested on these treated sites by artificially induced ...
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(Pretoria : The Government Printer, 1949)Experiments were done at Mbosi, in Southern Tanganyika, to determine the efficiency and safety of formalinized spleen vaccine and attenuated goat virus as agents of conferring immunity to cattle in the area. The ...
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(Pretoria : The Government Printer, 1949)1. Lantadene A was subjected to dry distillation yielding: (a) A lactone, C₆H₈O₂, B.P. 200°C./650 mm. Hg, probably "Terelactone". (b) A crystalline product, M.P. 125°C. which has not yet been investigated further. ...
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(Pretoria : The Government Printer, 1949)1. Dehydrogenation of Lantadene A with selenium yielded sapotalene and 1, 2, 6-trimethylphenanthrene, along with a C₁₇H₁₆O compound. 2. Dehydrogenation of Lantadene A-resin and Lantadene B similarly yielded sapotalene ...
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(Pretoria : The Government Printer, 1949)Part I. 1. The sperm picture of rams of different breeds has been studied. 2. Semen was collected by Gunn’s electrical method. 3. The Ronderib Afrikaners were superior to the Merinos in semen characteristics . This may ...
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(Pretoria : The Government Printer, 1949)1. In vitro experiments have been conducted on the disappearance of potassium nitrate in ruminal ingesta from sheep on different diets. 2. Nitrate disappears more rapidly from ingesta of lucerne-fed sheep than from that ...
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(Pretoria : The Government Printer, 1949)(1) On a ration of poor quality grass hay sheep were found to maintain their normal intake of water when allowed to drink for one hour only every second clay. (2) When given water at 72 and 96 hour intervals the total ...
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(Pretoria : The Government Printer, 1949)1. The consumption of lucerne hay and water by merino sheep has been recorded in two separate but identically concluded experiments under the following conditions: (i) Both food and water given ad lib. (ii) Water ...
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(Pretoria : The Government Printer, 1949)
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(Pretoria : The Government Printer, 1949)1. The distribution of B. decoloratus has been given in terms of political divisions as well as in terms of vegetational coverage. 2. The factor playing the most important role in limiting the spread of B. decoloratus ...
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(Pretoria : The Government Printer, 1949)1. The distribution of R. appendiculatus has been given in terms of political divisions as well as in terms of vegetational coverage. 2. R. appendiculatus is seen to be present in areas with a rainfall above 15 in. per ...
Now showing items 1-17 of 17