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| Slots, T.; Skibsted, L.H.; Nielsen, J.H.. |
| Milk from cows fed high concentration of synthetic all-rac-a-tocopheryl acetate (2-3 g day-1) were shown not to have improved oxidative stability, when oxidation were initiated by light exposure or Cu(II) addition. For milk with high fraction of unsaturated lipids as obtained through feed with toasted soybeans, the high a-tocopherol content even acted prooxidative. Stereo-selective analysis of the milk showed that among the 8 stereo-isomers of all-rac-a-tocopherol, only the 2R-stereo-isomers were excreted into the milk and among these mainly the native RRR-stereo-isomer. Feeding studies of dairy cows should accordingly be reevaluated in two respect: (i) the use of high level supplementation of a-tocopherol, as it may induce lipid oxidation, (ii) the use of... |
| Tipo: Journal paper |
Palavras-chave: Soil biology. |
| Ano: 2007 |
URL: http://orgprints.org/3922/1/3922.pdf |
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| Slots, T.; Butler, G.; Leifert, C.; Kristensen, T.; Skibsted, L.H.; Nielsen, J.H.. |
| To investigate the effect of the dietary intake of the cow on milk composition, bulk-tank milk was collected on 5 occasions from conventional (n = 15) and organic (n = 10) farms in Denmark and on 4 occasions from low-input nonorganic farms in the United Kingdom, along with management and production parameters. Production of milk based on feeding a high intake of cereals, pasture, and grass silage resulted in milk with a high concentration of α-linolenic acid (9.4 ± 0.2 mg/ kg of fatty acids), polyunsaturated fatty acids (3.66 ± 0.07 mg/kg of fatty acids), and natural stereoisomer of α-tocopherol (RRR-α-tocopherol, 18.6 ± 0.5 mg/kg of milk fat). A milk production system using a high proportion of maize silage, by-products, and commercial concentrate mix was... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Dairy cattle Feeding and growth. |
| Ano: 2009 |
URL: http://orgprints.org/16018/3/16018.pdf |
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