ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Most stability studies on carotenoid pigments and vitamins A in food systems concern autoxidation only. Trans-cis isomerization of all-trans lycopene (ATL) during tomato processing, and subsequent reversion in storage, lead to different sequence. Proposed reaction pathway scheme, based on known isomer characteristics and constituent reactions, includes lycopene autoxidation/isomerization relationships. The pathway may be applicable more generally to carotenoid degradation in other foods. Stage I: ATL oxidizes or isomerizes (up to 20%) to less colored, more oxidizable cis-forms which either autoxidize or revert to ATL. Processing and storage conditions influence distribution between two routes. Stage II: all forms autoxidize. Oxidized degradation products and fragments accumulate, with product fading and off-flavor. Presented scheme integrates available information, enables both kinetic and technological system considerations. Knowledge of lycopene behavior aids in improving tomato powder color retention and quality.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1979.tb10011.x
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