VITAMIN A CONTENT OF SHEEP'S COLOSTRUM AND MILK<sup>1</sup>

Sattereield, G. Howard; Clegg, R. E.; Holmes, Arthur D.

doi:10.1111/j.1365-2621.1944.tb16679.x

Cited by 4 publications

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References 8 publications

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“…which is of the same order as our figure for sow's colostrum. The data of Sattersfield, Clegg & Holmes (16) for Hampshire ewes are expressed in units insufficiently defined to allow conversion by us to international units.…”

Section: Resultsmentioning

confidence: 99%

344. A Note on Certain Vitamins of Sow's Colostrum

Braude

1946

Journal of Dairy Research

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1. Eighteen samples of colostrum obtained from Large White sows during parturition were examined for total solids, fat, vitamin A, vitamin B^ riboflavin and vitamin C.2. The mean values and ranges for the total solids (fourteen samples) and fat (fifteen samples) were 23.9% (20.6–27.2%) and 3.4% (1.7–5.8%) respectively.3. The mean vitamin A content of eighteen samples was 247 i.u./100 ml. with a range of 103.462 i.u./lOO ml., or 89 i.u./g. fat with a range of 42–137 i.u./g. fat. No β-.carotene was detected in any of the samples.4. The mean vitamin B1 content of seventeen samples was 145 /µg./100 ml. with a range of 81.260 µg./100 ml.5. The mean riboflavin content of sixteen samples was 45.6 µg./100 ml. with a range of 21–78 µg./100 ml.6. The mean ascorbic acid content of seventeen samples was 23.8 mg./100ml. with a range of 12–36 mg./100 ml.

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Section: Resultsmentioning

confidence: 99%

344. A Note on Certain Vitamins of Sow's Colostrum

Braude

1946

Journal of Dairy Research

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The partition of carotenoids and vitamin A in the colostrum and milk of the cow and the goat

Chanda

1953

J. Agric. Sci.

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The partition of carotenoids and vitamin A in the colostrum of nine cows and six goats and in the milk of three cows and two goats was determined using chromatographic and spectrophotometric methods. The following were the main results:1. The content of β-carotene and vitamin A in the colostrum decreased rapidly during the first nine milkings in both the cow and the goat. The rates of decline were logarithmic. Logarithmic regressions also showed that the decreases in β-carotene were more rapid than those of vitamin A.2. The heifers secreted more vitamin A in their colostral fat than did cows on the same ration. The vitamin A content of the colostral fat of goats was greater during the first lactation than in later lactations. There was no difference in the rates of decrease of the vitamin A content of heifer and cow colostrum, but the difference between the rates of decreases of colostral vitamin A of first and later lactation goats was significant.3. The colostral fat of cows at pasture contained more vitamin A than that of cows on winter rations. There was no difference between the logarithmic rates of decrease in the two groups during the first nine milkings. The colostral fat of four goats receiving winter rations was richer in vitamin A than that of three cows treated similarly, and this superiority of the goat over the cow persisted throughout lactation.4. There was no difference between the carotene content of the colostral fat of the first and later lactation cows. The yield of fat and β-carotene of the heifers was smaller than that of the cows. Cows at pasture secreted more β-carotene in their colostrum than the cows on winter rations. The presence of β-carotene was demonstrated in goat colostrum, although mature goat milk was free from any measurable quantity of carotenoids.

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The Absorption of Vitamin A from Colostrum by Lambs

Eden

1948

Br J Nutr

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The experiments of Dann (1932) and others indicated that in man, rat, cattle and other species, vitamin A under ordinary dietary conditions is not readily transferred from the mother to the foetus. Underwood & Curnow (1943) and Barcroft & Eden (unpublished) have shown that this conclusion also applies to the sheep, the concentrations of vitamin A in the blood and the liver of the foetuses always being much lower than those found in the ewe.Dann ( 2m3600 i.u./roo ml. at parturition. These high values were found to fall during the following few days, until the values for milk were reached which were about one-tenth of the figures given above.Until recently no thorough investigation had been made of the vitamin A status of newborn lambs. The present work was therefore carried out in order to find the levels of vitamin A present in the lamb shortly after birth, and the effect of the ingestion of colostrum during the first few days of life. The results obtained have been in good general agreement with those of Peirce (1947) in Australia, published since this work was concluded. EXPERIMENTALThe estimation of witamin A Serum (2 ml.) was extracted according to the method of Yudkin ( I~I ) , which consists in precipitating the proteins with alcohol and then extracting with light petroleum. Colostrum was extracted by a modification of the method of Olson, Hegsted & Peterson (1939). The early samples of colostrum were diluted with water so as to reduce their viscosity. Samples of 1-5 ml. were made up to 5 ml. with water in a small graduated separating funnel and were shaken with 0.5 ml. of concentrated ammonium hydroxide and then with 5 ml. of ethanol. For the exection of fats 7-5 ml. of ether were added, the funnel was shaken for about 30 sec., 2-5 ml. of light petroleum were then added and the funnel 'was shaken again. The ethereal layer was siphoned off into another separating funnel, and the extraction was repeated three times with the same quantities of ether and light petroleum. The combined extracts were allowed to stand for any particles to settle out and were washed three times with 10, 30 and 30 ml. of water, respectively. The water was drawn off and the extract again allowed to stand for a further 30min. The extract was dried by filtering through anhydrous sodium

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VITAMIN A CONTENT OF SHEEP'S COLOSTRUM AND MILK¹

Cited by 4 publications

References 8 publications

344. A Note on Certain Vitamins of Sow's Colostrum

344. A Note on Certain Vitamins of Sow's Colostrum

The partition of carotenoids and vitamin A in the colostrum and milk of the cow and the goat

The Absorption of Vitamin A from Colostrum by Lambs

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VITAMIN A CONTENT OF SHEEP'S COLOSTRUM AND MILK1

Cited by 4 publications

References 8 publications

344. A Note on Certain Vitamins of Sow's Colostrum

344. A Note on Certain Vitamins of Sow's Colostrum

The partition of carotenoids and vitamin A in the colostrum and milk of the cow and the goat

The Absorption of Vitamin A from Colostrum by Lambs

Contact Info

Product

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About

VITAMIN A CONTENT OF SHEEP'S COLOSTRUM AND MILK¹