Delgado-Vargas F, Paredes-López O, Avila-González E
Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Apartado Postal 1354, Culiacán, Sinaloa, Mexico; Departamento de Biotecnología y Bioquímica, Unidad Irapuato, Centro de Investigación y de Estudios Avanzados del IPN, Apartado Postal 629, 36500 Irapuato, Gto., Mexico; and Facultad de Medicina Veterinaria y Zootecnia, UNAM, Salvador Díaz Mirón s/n, 13200 Zapotitlán, Tláhuac, D.F. Mexico.
J Agric Food Chem. 1998 Feb 16;46(2):698-706. doi: 10.1021/jf9702454.
The effect of sunlight illumination of marigold flower meal on the pigmentation of feed for laying hens and of their resulting egg yolks was evaluated by high-performance liquid chromatography and by subjective and light reflectance colorimetry techniques. Illumination did not have an effect on the identity of carotenoids in the flower meal. Interestingly, illuminated marigold flower meals yielded an oleoresin with a higher all-trans-zeaxanthin level, with respect to meals kept in darkness. A higher level of all-trans-zeaxanthin was also present in feed pigmented with that oleoresin. Additionally, this pigmented feed showed the best color values and resulted in egg yolks with good color; remarkably, these egg yolks had a low pigment content with respect to control treatments. Thus, sunlight illumination of marigold flower meal showed a positive effect on egg yolk color; the main factors contributing to this effect were not the identity or quantity of carotenoids in laying hen feed or egg yolks, but rather other as yet unidentified marigold component(s) which was (were) somehow influenced by sunlight illumination.
通过高效液相色谱法以及主观和光反射比色法技术，评估了金盏花花粉的日光照射对蛋鸡饲料及其所产蛋黄色素沉着的影响。光照对花粉中类胡萝卜素的种类没有影响。有趣的是，与保存在黑暗中的花粉相比，经光照的金盏花花粉产生的辣椒油树脂具有更高水平的全反式玉米黄质。用该辣椒油树脂着色的饲料中也存在较高水平的全反式玉米黄质。此外，这种着色饲料显示出最佳的颜色值，并使蛋黄具有良好的色泽；值得注意的是，与对照处理相比，这些蛋黄的色素含量较低。因此，金盏花花粉的日光照射对蛋黄颜色有积极影响；造成这种影响的主要因素不是蛋鸡饲料或蛋黄中类胡萝卜素的种类或数量，而是其他尚未确定的金盏花成分，这些成分在某种程度上受到日光照射的影响。
