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1951 Onderstepoort Journal of Veterinary Research, Volume 25, Number 1 & 2, 1951
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Browsing 1951 Onderstepoort Journal of Veterinary Research, Volume 25, Number 1 & 2, 1951 by Issue Date

Browsing 1951 Onderstepoort Journal of Veterinary Research, Volume 25, Number 1 & 2, 1951 by Issue Date

Now showing items 1-15 of 15

Studies on the alimentary tract of the merino sheep in South Africa. XXI. The toxicity of urea to sheep under different conditions

Clark, R.; Oyaert, W.; Quin, J.I.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

The dosing of urea into the rumen of sheep caused acute intoxication characterised by atony of the rumen, muscular spasms and sudden death due to circulatory failure. The toxicity of urea was found to depend on the ...
Studies on the alimentary tract of the merino sheep in South Africa. XXII. The effect of the pH of the ruminal contents on ruminal motility

Clark, R.; Lombard, W.A.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

1. It has been shown that the administration of alkali (sodium carbonate or sodium hydroxide) into the rumen causes ruminal paresis if the pH exceeds approximately 7•5. 2. Ruminal paresis can also be caused by the ...
The use of egg attenuated bluetongue virus in the production of a polyvalent vaccine for sheep. A. Propagation of the virus in sheep

Alexander, R.A.; Haig, D.A.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

(1) A brief description of Theiler's classical method of bluetongue vaccine production is given and various modifications introduced from time to time are recorded. (2) In an attempt to adapt the recognized technique ...
Fowl-pox vaccination in South Africa with egg-propagated fowl and pigeon-pox viruses

Haig, D.A.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

1. Fowl-pox as it occurs in the Union of South Africa is reviewed briefly together with relevant literature on the methods of immunization. 2. In South Africa until recently vaccine prepared from virus propagated on pigeons ...
The oestrous cycle of the mare when maintained under stabled conditions with restricted exercise at Onderstepoort

Quinlan, J.; Steyn, H.P.; Van Rensburg, S.W.J.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

(1) Observations were carried out on the oestrous cycle of 30 mares from January, 1944, to June, 1946. (2) The mares were stabled at night and ran out in a small paddock during the day. They were never let out to grazing ...
The Brucella ring test for milk of individual cows and its value for determining their status of infection

Van Drimmelen, G.C.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

1. A technique is described whereby the Brucella Ring Test for milk can usefully be applied to individual cattle. 2. Results are reported which suggest that the Ring Test on individual animals may give a very useful ...
The influence of nutritional level on verminosis in merino lambs

Laurence, G.B.; Groenewald, J.W.; Quin, J.I.; Clark, R.; Ortlepp, R.J.; Bosman, S.W.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

1. A mass mixed infestation of Haemonchus contortus and Oesophagostomum, columbianum larvae dosed to 7-8 month old merino lambs kept on two different planes of nutrition caused a peracute fatal verminosis in all the ...
Studies on the alimentary tract of the merino sheep in South Africa. XX. The failure of the rumen musculature to respond to carbamylcholine chloride when paralysed by potassium cyanide

Clark, R.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

1. It was found that acetylcholine did not restore motility to the isolated rabbit duodenal strip inhibited by prussic acid. 2. Similarly ruminal paresis induced by, prussic acid could not be successfully treated with ...
Studies in demyelinating diseases of sheep associated with copper deficiency. I. "Lamkruis," a demyelinating disease of lambs occurring in South Africa. II. A biochemical investigation on the incidence of " Lamkruis " in lambs in the Saldanha Bay, Vredenburg, and St. Helena Bay environs. III. Experimental studies, treatment and control measures

Schulz, K.C.A.; Van der Merwe, P.K.; Van Rensburg, P.J.J.; Swart, J.S.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

It cannot be claimed that the observations recorded have led to specific information as to the cause of the disease known as "lamkruis", yet valuable information has been obtained which makes it clear that the factors ...
A contribution to the cytology of the spleen: the Romanowsky-stained bovine spleen smear

Jackson, Cecil; De Boom, H.P.A.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

A. The essence of this work has been to provide a systematic description of the elements and an explanation of the chief artefacts of the bovine spleen smear together with an atlas-guide. Hence no general summary is ...
The South African biting midges of the genus Culicoides (Ceratopogonid., Dipt.)

Fiedler, O.G.H.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)
Studies on the alimentary tract of the merino sheep in South Africa. XVIII. The effect of fasting on the activity of the ruminal flora of sheep and cattle

Quin, J.I.; Oyaert, W.; Clark, R.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

1. The effects of starvation on the consistence of the ruminal ingesta and the activity of the ruminal flora have been studied. 2. The ruminal contents were found to become progressively more watery during starvation ...
Studies on the alimentary tract of the merino sheep in South Africa. XXIII. The effect of supplementing poor quality grass hay with molasses and nitrogenous salts

Clark, R.; Quin, J.I.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

1. In a series of three experiments it has been shown that the supplementation of poor quality grass hay with either urea or sodium nitrate, in conjunction with molasses resulted in increased appetite and improved ...
A photometric method for quantitative paper partition chromatography of amino acids

Polson, A.; Van Rooy, P.J.; Marais, E.J.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

Due to the difficulties involved in the visual estimation of amino acids in protein hydrolysates from serial dilutions on chromatograms a very simple photoelectric method was devised to facilitate the accurate estimation ...
Studies on the alimentary tract of the merino sheep in South Africa. XIX. The influence of sulphanilamide on the activity of the ruminal flora of sheep and cattle

Oyaert, W.; Quin, J.I.; Clark, R.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)

(1) It has been shown that therapeutic doses of sulphanilamide depress cellulose digestion and appetite in ruminants. (2) The fermentation of sugar and gas formation are also suppressed but only by higher concentrations. (3) ...

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Browsing 1951 Onderstepoort Journal of Veterinary Research, Volume 25, Number 1 & 2, 1951 by Issue Date

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