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Title: Lipid oxidation in food and model system
Author(s): Henson, Lulu Salvador
Doctoral Committee Chair(s): Siedler, Arthur J.
Department / Program: Food Science and Human Nutrition
Discipline: Food Science
Degree Granting Institution: University of Illinois at Urbana-Champaign
Degree: Ph.D.
Genre: Dissertation
Subject(s): Agriculture, Food Science and Technology
Chemistry, Agricultural
Abstract: The effect of added iron on lipid oxidation in reheated cooked beef products and the thermal decomposition products of methyl arachidonate were examined. Ferrous acetate was added to beef roasts and steaks at 15 to 300 ppm of iron, cooked, and stored at 3.3$\sp\circ$C for 48 hrs. TBA values and off-flavor scores indicated that iron addition enhanced lipid oxidation. Vacuum packaging was effective in minimizing lipid oxidation in the cooked beef products. The thermal decomposition products of methyl arachidonate (oxidized 48 hrs at 37$\sp\circ$C) were separated by capillary GC and identified by GC/MS. Various aldehydes, ketones, aldehyde esters, hydrocarbons and alcohols were identified. The major products included hexanal, methyl 5-oxopentanoate, pentane, methyl butanoate, and 2,4-decadienal. Odor analysis of the oxidation products by GC effluent sniffing showed 22 regions wherein distinct odors could be detected which consisted of green/grassy, cheesy, mushroom, citrusy, floral, fishy, fatty, waxy, among others. These odors could be important to off-odors and off-flavors developed in oxidized food systems containing arachidonate.
Issue Date: 1990
Type: Text
Language: English
URI: http://hdl.handle.net/2142/20147
Rights Information: Copyright 1990 Henson, Lulu Salvador
Date Available in IDEALS: 2011-05-07
Identifier in Online Catalog: AAI9114263
OCLC Identifier: (UMI)AAI9114263


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