The Stability of Vitamin A from Cod Liver Oil in Mixed Feeds

Holder, R. C.; Ford, Sarah K.

doi:10.3382/ps.0180345

Cited by 9 publications

(2 citation statements)

References 5 publications

(5 reference statements)

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“…Miller et al (1942), Halpern et al (1949), and Halverson and Hart (1950) have demonstrated the destructive effect of trace minerals upon the vitamin A of cod liver oil in mixed feeds. Holder and Ford (1939) and Bethke et al (1939) also found a destructive effect of meat scraps upon the vitamin A of cod liver oil in mixed feeds. Fraps and Kemmerer (1937) found alfalfa leaf meal to be a slightly more stable source of vitamin A activity in stored feeds than cod liver oil.…”

Section: Departments Of Poultry Husbandry and Biochemistry And Nutritmentioning

confidence: 89%

The Stability of Vitamin A in Mixed Feeds and Premixes

Reid¹,

Daugherty²,

Couch³

1955

Poultry Science

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Section: Departments Of Poultry Husbandry and Biochemistry And Nutritmentioning

confidence: 89%

The Stability of Vitamin A in Mixed Feeds and Premixes

Reid¹,

Daugherty²,

Couch³

1955

Poultry Science

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“…Baird, Ringrose, and MacMillan (1939) found progressive but not complete destruction of vitamin A from fortified cod liver oil when mixed in a chick ration and stored in burlap bags at summer temperatures for 25 weeks. Holder and Ford (1939) in a study of the stability of vitamin A from cod liver oil in mixed feeds report "Some grades of meat or fish scrap used in poultry feeds may promote vitamin A destruction although there was no evidence of any loss from the meatscraps used in this investigation. "…”

mentioning

confidence: 92%

Free Fatty Acids and Rancidity in Relation to Animal By-Product Protein Concentrates

Gray

Robinson

1941

Poultry Science

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The stability of vitamin A in animal feeding‐stuffs

Davies¹,

Worden²

1954

J Sci Food Agric

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ConclusionThe continuous removal of extractants during the lignin pretreatment procedure has been accomplished in Soxhlet extractors. More time is required to remove an equivalent weight of the original material by the continuous-extraction method than by the standard refluxing procedure. The lignin isolated by this method contains less nitrogen than that isolated by the standard A.O.A.C. pretreatment procedure apd would, therefore, appear to contain less contaminating material. On the other hand, the lower methoxyl content of the lignin isolated by the continuous-extraction method is surprising. It is suggested that contamination of lignin with methoxyl-containing residues may be more serious than has generally been recognized.The method described avoids a great deal of the handling required with the methods now in use and is readily adaptable to routine analytical determinations.The stability of vitamin A in mixed rations has been studied under a variety of storage conditions. With vitamin A, added in the form of cod-liver oil (C.L.O.), stability is greater in a mash of medium particulate size than in one of coarse particulate size ; this effect has been constant when light, temperature and the nature of the container, with corresponding variations in the degree of exposure to atmospheric oxidation, have been varied. The destructive action of mineral salts on this form of vitamin A has been confirmed, and found to be reversed by the addition of gelatin. The stability of vitamin A in cod-liver oil is greater in the presence of fish meal or liver meal, but less in the presence of dried brewer's yeast, than in the presence of various cereal products. ' Cubing of the diet ' asserts a protective action on vitamin-A palmitate. In the particular conditions of our experiments, the stability of vitamin-A palmitate is greater than that of vitamin A in the form of C.L.O. when added to a mixed meal.

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The Stability of Vitamin A from Cod Liver Oil in Mixed Feeds

Cited by 9 publications

References 5 publications

The Stability of Vitamin A in Mixed Feeds and Premixes

The Stability of Vitamin A in Mixed Feeds and Premixes

Free Fatty Acids and Rancidity in Relation to Animal By-Product Protein Concentrates

The stability of vitamin A in animal feeding‐stuffs

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