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Effect on yolk colour of hen's eggs of supplements of carotenoids to the feed. 3. Supplements of beta -apo-8'carotenal, beta -apo-8'-carotenoic acid ethyl ester, canthaxanthin and paprika


Effect on yolk colour of hen's eggs of supplements of carotenoids to the feed. 3. Supplements of beta -apo-8'carotenal, beta -apo-8'-carotenoic acid ethyl ester, canthaxanthin and paprika



Ztschr. Lebensmittel-Untersuch.-Forsch 136: 203-214



During 7 weeks, 5, 10 or 20 mg carotenal was added per kg feed, or 5, 15 or 50 mg carophyll as the pure carotenoic acid ethyl ester, or 3 mg canthaxanthin for 5 weeks, or 2 or 1 mg of it with, respectively, 3 and 6 mg of the ethyl ester or carotenal or 9 mg carotenal alone, or for 4 weeks 1, 3 or 6% paprika alone. Carotenal and the ethyl ester produced golden yellow yolks and canthaxanthin and paprika carotenoids reddish ones.

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Related references

Effect on yolk colour of hen's eggs of supplements of carotenoids to the feed. 2. Supplements of beta carotene and bixin. Ztschr. Lebensmittel-Untersuch.-Forsch 136: 129-136, 1968

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