| Supplementation of laying-hen feed with palm tocos and algal astaxanthin for egg yolk nutrient enrichment. | |
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MedLine Citation:
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PMID: 22276647 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Adding supplements to hen feed can increase egg nutritional value. Astaxanthin, tocotrienols, and tocopherols are potent antioxidants that provide health benefits to humans. We hypothesized that the addition of these nutrients to hen feed would result in an increased nutrient content in egg yolk with minimum changes in functional properties. Laying-hens (W-36 breed) were fed four diets with different supplementation levels of palm toco concentrate and algae biomass containing astaxanthin for eight weeks. Egg yolks were analyzed for physical, chemical and functional properties. Feed with the highest nutrient concentration was also studied for stability of these antioxidants using the Arrhenius approach. No significant differences were observed in functional properties, except for emulsification capacity and sensory characteristics among eggs from different diet treatments. Changes in egg yolk color reached the maximum values at day 8. Incorporation of tocopherols and tocotrienols increased until day 8 and astaxanthin incorporation increased until day 10, and all decreased thereafter. Feed nutrients resulted in a dose-response relationship of these compounds in the egg yolk. Transfer efficiency ranged from 0-9.9% for tocotrienols and tocopherols and 7.6-14.9% for astaxanthin at their peak values. Results of the Arrhenius accelerated stability study showed significant differences in shelf-life of various nutrients and such results can be used to properly formulate and store the feed materials. |
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Authors:
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Laurie Walker; Tong Wang; Hongwei Xin; David Dolde |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-26 |
Journal Detail:
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Title: Journal of agricultural and food chemistry Volume: - ISSN: 1520-5118 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0374755 Medline TA: J Agric Food Chem Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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