Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 55, Issue 13, Pages 5238-5245Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf0634348
Keywords
light; halogen lamp; fluorescent lamp; beta-carotene; beta-ionone; aqueous system; color
Ask authors/readers for more resources
The aim of this work was to investigate the reaction kinetics of beta-carotene in an aqueous medium as a function of exposure to commercial lights (halogen and fluorescent sources) and oxygen partial pressures. The evolution of the pigment concentration, the changes in color, and the accumulation of a volatile compound (beta-ionone) were monitored during storage. The kinetics of degradation were mathematically modeled to compare the effects of lighting conditions and oxygen partial pressures. Lighting was also a critical variable in the presence of a low oxygen partial pressure (5 kPa), and in these conditions, the beta-carotene degraded completely during storage, even if more slowly than at 20 kPa of O-2. The pigment degradation was correlated to illuminance and UVA irradiance values, but the different decay rates of the fluorescent lamps were explained by the differences in the blue region of the energy emission spectra. A halogen lamp gave minor negative effects on beta-carotene degradation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available