Preparation and Storage of Carotene Concentrates

Mitchell, H. L.; Schrenk, W. G.; King, H. H.

doi:10.1021/ie50471a027

Cited by 4 publications

(6 citation statements)

References 5 publications

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“…per pound. Under similar conditions Mitchell et al (4) working with a concentration of 700,000 I.U. per pound found 60% losses.…”

Section: Concentrationmentioning

confidence: 84%

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Stability of Carotene and Vitamin A in Dry Mixtures

Wall¹,

Kelley²

1951

Ind. Eng. Chem.

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“…per pound. Under similar conditions Mitchell et al (4) working with a concentration of 700,000 I.U. per pound found 60% losses.…”

Section: Concentrationmentioning

confidence: 84%

“…These workers used a storage temperature of 37°C. At room temperature, probably about 25°C ., Morgal et al (o) reported only 4 to 19% destruction in 5 months when an alfalfa carotene concentrate was mixed with a soybean meal base in a concentration of 60,000 I.U. per pound.…”

Section: Concentrationmentioning

confidence: 99%

Stability of Carotene and Vitamin A in Dry Mixtures

Wall¹,

Kelley²

1951

Ind. Eng. Chem.

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“…THE autoxidation of vitamin A in feeds is of concern to livestock and poultry feeders and to feed manufacturers. Antioxidants and synergists which retard autoxidation have been used with varying degrees of success in stabilizing oils (1, B) but when the vitamin is mixed with a feed, the problem of preventing autoxidation seems to become more difficult (4,5).…”

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confidence: 99%

Stability of Dry Vitamin A Concentrates

Burns¹,

Quackenbush²

1951

Ind. Eng. Chem.

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Manufacturers of conimercial feeds and livestock feeders have long been plagued with the problem of vitamin A deterioration between the time of addition of the vitamin and the consumption of the feed. In efforts to solve this problem, a number of suppliers of vitamin A products have recently placed on the market dry vitamin A preparations which are claimed to be stable. The purpose of this investigation was to compare the stability of these products, both as received and when mixed with some of the common ingredients of feeds. All manufacturers willingly supplied samples of their products, but some revealed only general information concerning composition.The results show that all of these dry vitamin A products represent an improvement over vitamin A oils of the past, but that none of the dry products is greatly superior to the others. All lost some of their initial vitamin but retained more than 500/, of it, during 6 months' storage at room temperature. In most cases mixing with corn and soybean meal improved the stability.These results should provide useful information to feed manufacturers, nutritionists, and feeders. HE autoxidation of vitamin A in feeds is of mncern to live-( 3 ) J .

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“…A number of other materials had little effect on carotene retention. EVIDENCE has been presented (1,8,6,7) to show that some ingredients of mixed feeds may affect the stability of carotene in the feed. Most of the'work has been done with carotene which was dissolved in oils and added to feeds in the form of carotene concentrates.…”

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confidence: 99%