TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Ostertag, Edwin
A1  - Scholz, Miriam
A1  - Klein, Julia
A1  - Rebner, Karsten
A1  - Oelkrug, Dieter
T1  - Pigmentation of white, brown and green chicken eggshells analyzed by reflectance, transmittance and fluorescence spectroscopy
JF  - ChemistryOpen
N2  - We report on the reflectance, transmittance and fluorescence spectra (λ=200–1200nm) of four types of chicken eggshells (white, brown, light green, dark green) measured in situ without pretreatment and after ablation of 20–100 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 color pigments 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.
KW  - chicken eggshells
KW  - fluorescence spectroscopy
KW  - UV/VIS spectroscopy
KW  - porphyrinoids
KW  - proteins
KW  - amino acids
Y1  - 2019
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:rt2-opus4-22768
SN  - 2191-1355
SS  - 2191-1355
U6  - https://doi.org/10.1002/open.201900154
DO  - https://doi.org/10.1002/open.201900154
VL  - 8
IS  - 8
SP  - 1084
EP  - 1093
S1  - 10
PB  - Wiley
CY  - Weinheim
ER  -