Journal
FOOD CHEMISTRY
Volume 338, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2020.128004
Keywords
beta-Carotene; alpha-Carotene; Vitamin A deficiency; UV-C light; Pulsed light; Bioavailability
Funding
- SFR Tersys, Avignon University, France
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By manipulating post-harvest factors such as pulsed light treatment, storage duration, and temperature, the concentrations of proVitamin A carotenoids in carrots can be significantly increased. However, while pulsed light treatment can temporarily boost proVA CAR concentrations, the effect diminishes over time.
The aim was to enhance provitamin A carotenoid (proVA CAR) concentrations and bioaccessibility in carrots by manipulating post-harvest factors. To that end, we assessed the effects of Ultraviolet-C light, pulsed light, storage temperature, and storage duration. We also measured CAR bioaccessibility by using an in vitro model. Pulsed light, but not Ultraviolet-C, treatment increased proVA CAR concentrations in the cortex tissue (p < 0.05). Longer storage times and higher temperatures also increased concentrations (p < 0.05). The maximal increase induced by pulsed light was obtained after treatment with 20 kJ/m(2) and 3-days of storage at 20 degrees C. However, the positive effect induced by pulsed light decreased considerably over the next seven days. ProVA CAR in carrots with the highest concentrations also proved to be more bioaccessible (p < 0.05). Thus, proVA CAR concentrations in stored carrots can be increased significantly through storage times and temperatures. Pulsed light can also significantly increase proVA CAR concentrations, but only temporarily.
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