Pigmentation of White, Brown, and Green Chicken Eggshells Analyzed by Reflectance, Transmittance, and Fluorescence Spectroscopy.
ChemistryOpen
; 8(8): 1084-1093, 2019 Aug.
Article
en En
| MEDLINE
| ID: mdl-31406655
We report on the reflectance, transmittance and fluorescence spectra (λ=200-1200â
nm) of four types of chicken eggshells (white, brown, light green, dark green) measured inâ
situ without pretreatment and after ablation of 20-100â
µm of the outer shell regions. The color pigment protoporphyrin IX (PPIX) is embedded in the protein phase of all four shell types as highly fluorescent monomers, in the white and light green shells additionally as non-fluorescent dimers, and in the brown and dark green shells mainly as non-fluorescent poly-aggregates. The green shell colors are formed from an approximately equimolar mixture of PPIX and biliverdin. The axial distribution of protein and colorpigments were evaluated from the combined reflectances of both the outer and inner shell surfaces, as well as from the transmittances. For the data generation we used the radiative transfer model in the random walk and Kubelka-Munk approaches.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
ChemistryOpen
Año:
2019
Tipo del documento:
Article
Pais de publicación:
Alemania