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Studies on the antioxidative activity of red pigments in Italian-type dry-cured ham

Adamsen, Christina E.; Hansen, Mette L.; Møller, Jens K.S. and Skibsted, Leif H. (2003) Studies on the antioxidative activity of red pigments in Italian-type dry-cured ham. European Food Research and Technology, 217 (3), pp. 201-206.

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Summary

Aqueous phosphate buffer extracts and acetone/water extracts of pigments from Parma ham were assessed as antioxidants by (1) electron spin resonance spectroscopy using a spin probing technique to evaluate their efficiencies as scavengers of free radicals, and (2) by electrochemical measurement of oxygen depletion rate in an aqueous methyl linoleate emulsion to evaluate their efficiencies as chain-breaking antioxidant, and using both methods, compared with the effect of apomyoglobin and nitrosylmyoglobin. Aqueous phosphate extracts and acetone/water extracts of Parma ham pigment both scavenged a semi-stable nitroxide radical (Fremy's salt), and both extracts reduced the rate of oxygen consumption for lipid peroxidation (initiated by metmyoglobin) very efficiently. For apomyoglobin no antioxidative capacity was observed, and the heme moiety of the pigment(s) of Parma ham were concluded to have antioxidative properties. The more lipophilic pigment, as extracted by acetone/water, had the most significant effect, and its ability to inhibit lipid oxidation was further tested in a model food system based on cooked pork. The lipid oxidation was increasingly inhibited by increasing additions from 0.12 ppm to 0.24 ppm Parma ham pigment, and the pigment protected a-tocopherol against degradation in a concentration dependent manner.


EPrint Type:Journal paper
Keywords:Dry-cured Parma ham, Pigment extracts, Antioxidative activity, Electron spin resonance spin probing, Oxygen consumption
Subjects: Food systems > Processing, packaging and transportation
Research affiliation: Denmark > SOAR - Research School for Organic Agriculture and Food Systems
Deposited By: Adamsen, Ph.D. student, M.Sc. Food Science Christina Elslund
ID Code:3259
Deposited On:10 Sep 2004
Last Modified:12 Apr 2010 07:29
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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