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ISHS Acta Horticulturae 841: II International Symposium on Human Health Effects of Fruits and Vegetables: FAVHEALTH 2007

BETA-CAROTENE STABILITY DURING DRYING AND STORAGE OF CASSAVA AND SWEET POTATO

Authors:   P. Nascimento, N.S. Fernandes, M.A. Mauro, M. Kimura
Keywords:   carotenoid, degradation, retention, blanching, dehydration
Abstract:
The effect of blanching on the beta-carotene stability during drying and storage of cassava and sweet potato was evaluated. The orange-fleshed sweet potato showed good retention of beta-carotene during the blanching and drying (100% and 96%, respectively), but lower retention (84% and 91%) was observed in cassava. Cassava also showed lower beta-carotene stability than sweet potato during the storage of unblanched dried samples. beta-Carotene content of dried cassava was reduced from 8.6 μg/g to traces in 20 days of storage while the initial amount of dried sweet potato (463 μg/g) was reduced by about 45% (210 μg/g). Blanching did not affect the beta-carotene retention during the drying, but enhanced the stability of this carotenoid during the storage of dried samples at room temperature, especially in cassava. The initial levels of blanched-dried cassava and sweet potato (7.8 and 513 μg/g, respectively) took 70 days to fall by around 50%.
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