CIELAB color paths during meat shelf life
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Updated: Jan 21, 2026

The Effect of the Application of Thyme Essential Oil on Microbial Load During Meat Drying
Published on: March 14, 2018
Begoña Hernández Salueña1, Carlos Sáenz Gamasa1, José Manuel Diñeiro Rubial1
1Departamento de Ciencias, Universidad Pública de Navarra, Campus Arrosadía, 31006 Pamplona, Spain; Institute for Advanced Materials (INAMAT), Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain.
Abstract:
Meat color evolution from freshly cut to beyond shelf life, up to 40% of metmyoglobin, has been theoretically modeled using the Kubelka-Munk theory and a set of measured reference reflectance spectra of deoxymyoglobin, oxymyoglobin and metmyoglobin. Color evolution depicts characteristic color paths in CIELAB color space. During oxidation the model explains the approximately constancy of L*, b* and hab, with variations typically hidden by sample dispersion, and the special significance of a* and C* in relation with metmyoglobin formation. CIELAB ΔE* color difference and the reflectance ratio R630/R580 are even better indicators of metmyoglobin changes during oxidation. The role of a*, C*, ΔE* and R630/R580 and their relationship during oxidation is a normal feature in the model with quantitative predictions in general agreement with literature. Results further emphasize the dangers of reporting color coordinates in different illuminants.
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