933 PB 528 CONTROL OF LIPID OXIDATION IN ASPARAGUS BY VACUUM INFUSION OF ASCORBIC ACID

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  • 1 Department of Horticulture and Department of Food Science, University of Nebraska-Lincoln 68583-0919

Both fresh and frozen asparagus rapidly deteriorate in quality due, in part, to the formation of oxidative off-flavors. Anti-oxidants and chelating agents prevent lipid oxidation in vegetables, but increasing the levels of such compounds in whole vegetables is difficult. Vacuum infusion was optimized to saturate asparagus spears with ascorbic acid without damaging tissues. The combination of vacuum infusion of ascorbic acid and thermal blanching effectively prevented the formation of oxidative off-flavors and hexanal during frozen storage. Sensory evaluations correlated with hexanal levels following frozen storage.

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