Results 191 to 200 of about 12,553 (221)

The bioefficacy of microemulsified natural pigments in egg yolk pigmentation

British Poultry Science, 2014
1. This study was designed to test the hypothesis that microemulsified carotenoid products show improved bioavailability over corresponding regular preparations, leading to greater yolk pigmentation at lower dosages. 2. The first trial was conducted using a maize-soya bean basal diet supplemented with either 0.25, 0.5, 0.75, 1.0 and 1.25 g/kg of ...
P Y, Chow, S Z, Gue, S K, Leow, L B, Goh
exaly   +3 more sources

Research on Egg Yolk Pigmentation and its Practical Application

World's Poultry Science Journal, 1970
(1970). Research on Egg Yolk Pigmentation and its Practical Application. World's Poultry Science Journal: Vol. 26, No. 1, pp. 435-441.
exaly   +2 more sources

Absence of effects of dietary α‐tocopherol on egg yolk pigmentation

British Poultry Science, 1992
Abstract 1. Three experiments were carried out in which yolk colour and carotenoid content were measured in hens fed diets containing soyabean oil or tallow and supplemented with 0, 10, 20, 40, 80, 160 or 320 mg tocopheryl acetate. 2. Fat type had no consistent effect on yolk carotenoid content but yolk α‐tocopherol concentrations were lower with the ...
M. Frigg, C. C. Whitehead, S. Weber
exaly   +2 more sources

Yolk Pigments of the Mexican Leaf Frog

Science, 1983
Eggs of the Mexican leaf frog contain blue and yellow pigments identified as biliverdin and lutein, respectively. Both pigments are bound to proteins that occur in crystalline form in the yolk platelet. The major blue pigment is biliverdin IXα. The eggs vary in color from brilliant blue to pale yellow-green depending on the amount of each pigment ...
G V, Marinetti, J T, Bagnara
openaire   +2 more sources

REFLECTANCE COLORIMETRIC EVALUATION OF EGG YOLK PIGMENTATION

Journal of Food Science, 1974
Moderately pigmented yolks were diluted with pigment‐free yolks to provide a wide range of samples with which to compare standard beta carotene equivalents with excitation purity and luminous reflectance values obtained with a reflectance calorimeter.
J. L. FRY, C. F. HINTON, R. H. HARMS
openaire   +1 more source

Pigmentation of egg yolks with avorophyll

British Poultry Science, 1988
Abstract 1. Avorophyll, a product derived from the petals of marigold (Tagetes erecta), was tested for its pigmenting ability in a layers diet in added quantities of 0, 102, 159, 250, 364, 523 and 750 mg/kg. 2. Food intake, egg production and egg weight were measured. Yolk colours were compared with the Hoffman‐La Roche yolk colour fan by a panel of 10
openaire   +1 more source