| 摘要 |
A method of pigmenting certain parts and products of poultry, fish and crustacea by including in the feed of the pertinent animal one or more of the carotenoids 2'-dehydroplectaniaxanthin, desmethylspheroidenone, spheroidenone, 1-hydroxy-3,4-didehydro-1,2-dihydro- psi , psi -caroten-2-one, 5'-hydroxy-5',6'-dihydro-4'-apo- beta -caroten-6'-one, 1'-hydroxy-3',4'-didehydro-1',2'-dihydro- beta , psi -carotene-4,2'-dione and 5'-hydroxy-5',6'-dihydro-4'-apo- beta -carotene-4,6'-dione, poultry, fish and crustacea feeds for pigmenting certains parts and products of these animals, beadlets and premixes for adding to poultry, fish and crustacea feeds, and the carotenoids 1-hydroxy-3,4-didehydro-1,2-dihydro- psi , psi -caroten-2-one, 5'-hydroxy-5',6'-dihydro-4'-apo- beta -caroten-6'-one, 1'-hydroxy-3',4'-didehydro-1',2'-dihydro- beta , psi -carotene-4,2'-dione and 5'-hydroxy-5',6'-dihydro-4'-apo- beta -carotene-4,6'-dione.
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