Document Detail


Added triacylglycerols do not hasten hemoglobin-mediated lipid oxidation in washed minced cod muscle.
MedLine Citation:
PMID:  12405786     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Hemoglobin-mediated lipid oxidation in washed, minced cod muscle was related to the triacylglycerol to membrane lipid ratio. The same rapid development of thiobarbituric acid reactive substances (TBARS) and painty odor occurred with and without the presence of up to 15% menhaden oil. Without hemoglobin, development of TBARS and painty odor was slow, despite a high amount of hydroperoxides in samples with oil added (1135 micromol/kg muscle). This suggested that hemoglobin reacted by cleaving preformed hydroperoxides into secondary oxidation products. Nearly doubling the hemoglobin concentration approximately doubled the extent of lipid oxidation with and without added oil. This indicated that hemoglobin was limiting for the oxidation reaction. The noneffect of added oil suggests that membrane lipids and/or preformed membrane lipid hydroperoxides provided sufficient substrate in hemoglobin-catalyzed oxidation of washed minced cod muscle. Fe(2+-)ADP did not induce any oxidation of washed minced cod with/without added oil. Results suggest that lipid oxidation in fatty fish may be more related to the quantity and type of the aqueous pro-oxidant and the membrane lipids than to variations in total fat contents.
Authors:
Ingrid Undeland; Herbert O Hultin; Mark P Richards
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  50     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2002 Nov 
Date Detail:
Created Date:  2002-10-30     Completed Date:  2002-12-26     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  6847-53     Citation Subset:  IM    
Affiliation:
Chalmers University of Technology, Department of Food Science, P.O. Box 5401, S-402 29 Göteborg, Sweden. ingrid.undeland@fsc.chalmers.se
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MeSH Terms
Descriptor/Qualifier:
Animals
Cold Temperature
Fish Oils / administration & dosage
Fishes*
Food Technology
Hemoglobins / metabolism*
Hydrogen Peroxide / metabolism
Hydrogen-Ion Concentration
Lipid Peroxidation*
Membrane Lipids / analysis
Muscle, Skeletal / metabolism*
Odors / analysis
Thiobarbituric Acid Reactive Substances / analysis
Time Factors
Triglycerides / administration & dosage*
Chemical
Reg. No./Substance:
0/Fish Oils; 0/Hemoglobins; 0/Membrane Lipids; 0/Thiobarbituric Acid Reactive Substances; 0/Triglycerides; 7722-84-1/Hydrogen Peroxide; 8002-50-4/Menhaden oil

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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