Relationship between the kinetics of [bêta]-carotene degradation and formation of norisoprenoids in the storage of dried sweet potato chips
The effects of storage temperature (10; 20; 30; 40 _C), water activity (0.13; 0.30; 0.51; 0.76) and oxygen level (0%; 2.5%; 10%; 21%) on the degradation of carotenoids and formation of volatile compounds during storage of dried sweet potato chips were evaluated. A kinetic model was developed for degradation of trans-b-carotene and it showed that breakdown followed first order kinetics with an activation energy of 64.2 kJ mol_1. The difference between experimental data under laboratory or field conditions fitted and data predicted by the model was less than 10% for trans-b-carotene, or for total carotenoids. The formation of the volatile compounds, b-ionone; 5,6-epoxy-b-ionone; dihydroactinidiolide; b-cyclocitral, was measured by SPME-GC-MS and was clearly related to the degradation of trans-b-carotene. It is also suggested that carotenoid degradation in dried sweet potato was by autoxidation because of the trend in bcarotene degradation rate in relation to water activity or oxygen level.
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Bibliographic Details
Main Authors: |
Bechoff, Aurélie,
Dhuique-Mayer, Claudie,
Dornier, Manuel,
Tomlins, Keith I.,
Boulanger, Renaud,
Dufour, Dominique,
Westby, Andrew |
Format: | article
biblioteca
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Language: | eng |
Subjects: | Q02 - Traitement et conservation des produits alimentaires,
Q04 - Composition des produits alimentaires,
patate douce,
Ipomoea batatas,
caroténoïde,
composé volatil,
stockage,
biodégradation,
réaction chimique,
oxygène,
température,
Activité de l'eau,
isoprénoïde,
http://aims.fao.org/aos/agrovoc/c_14729,
http://aims.fao.org/aos/agrovoc/c_3937,
http://aims.fao.org/aos/agrovoc/c_1333,
http://aims.fao.org/aos/agrovoc/c_24933,
http://aims.fao.org/aos/agrovoc/c_7427,
http://aims.fao.org/aos/agrovoc/c_9261,
http://aims.fao.org/aos/agrovoc/c_25191,
http://aims.fao.org/aos/agrovoc/c_5477,
http://aims.fao.org/aos/agrovoc/c_7657,
http://aims.fao.org/aos/agrovoc/c_24929,
http://aims.fao.org/aos/agrovoc/c_36399,
http://aims.fao.org/aos/agrovoc/c_3081,
http://aims.fao.org/aos/agrovoc/c_8038, |
Online Access: | http://agritrop.cirad.fr/553538/
http://agritrop.cirad.fr/553538/1/document_553538.pdf
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