Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/105597
Type: Artigo de periódico
Title: Degradation Of Lycopene And β-carotene In Model Systems And In Lyophilized Guava During Ambient Storage: Kinetics, Structure, And Matrix Effects
Author: Ferreira J.E.M.
Rodriguez-Amaya D.B.
Abstract: Being highly unsaturated, carotenoids are susceptible to isomerization and oxidation during the processing and storage of food. In the present study, the degradation of acyclic lycopene and dicyclic β-carotene in low-moisture and aqueous model systems, as well as in lyophilized guava, during storage at ambient temperature, in the absence or presence of light, was investigated. Both carotenoids followed first order kinetics under the various conditions investigated. Lycopene degraded much faster than β-carotene in all the model systems. In a comparison of lycopene isolated from guava, tomato, and watermelon, greater losses were observed with lycopene from tomato. Since the model system was identical in the 3 cases, these results indicated that other compounds from the food sources, co-extracted with lycopene, might have influenced the oxidation. Light consistently and strongly promoted degradation under all conditions studied. The susceptibility of lycopene to degradation was much less in lyophilized guava than in the model systems, showing the marked protective influence of the food matrix. Loss of β-carotene, found at a concentration of about 18 times lower than lycopene, was only slightly lower than that of lycopene in lyophilized guava, indicating that the effect of matrix and/or the initial concentration overshadowed the structural influence. © 2008 Institute of Food Technologists®.
Editor: 
Rights: fechado
Identifier DOI: 10.1111/j.1750-3841.2008.00919.x
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-53549129712&partnerID=40&md5=833e0e89e83c44bd6e0d142565710267
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
2-s2.0-53549129712.pdf208.77 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.