Possibilities of enhancing the colour of egg yolk

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62157124%3A16270%2F12%3A43871152" target="_blank" >RIV/62157124:16270/12:43871152 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/jsfa.4657" target="_blank" >http://dx.doi.org/10.1002/jsfa.4657</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/jsfa.4657" target="_blank" >10.1002/jsfa.4657</a>

Result language
angličtina
Original language name
Possibilities of enhancing the colour of egg yolk
Original language description
BACKGROUND: This study attempts to compare two possibilities of enhancing the colour of egg yolk. One of them is based on the ecological rearing of laying hens on natural green grass whereas the other uses a feeding dose supplemented with natural pigments in laying hens reared in individual cages. Is it possible to distinguish these two technologies using yolk colour determination in the CIELAB system? RESULTS: Yolk colour parameters such as L?, a?, and b? in the group of grazed hens are significantly different (alfa = 0.001) from those observed in hens reared in cages. The yolk colour shows a darker, redder and more yellow colour. The greatest difference was seen in the red colour parameter, a?, that increased more than twice. Visually, this means a shift towards a more orange colour. Compared to grazing in the meadow (E? = 13.257), the addition of artificial pigments in the feed resulted in a more significant increase in the parameter E? (CIE total colour difference), with the greate
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
GH - Nutrition of farm animals
OECD FORD branch
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Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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