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Oxidative comparison of emulsion systems from fish oil-based structured lipid vs physically blended lipid with purple-fleshed sweet potato (Ipomoea batatas L.) extracts.
MedLine Citation:
PMID:  22117614     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The effect of the purple-fleshed sweet potato extract (PFSPE) on oxidation stabilities of a model oil-in-water emulsion prepared with enzymatically synthesized fish oil-soybean oil structured lipid (SL) vs physically blended lipid (PBL) without modification were evaluated. The anthocyanins in PFSPE were analyzed and identified by HPLC-MS. The fatty acid composition of SL was similar to that of PBL, except palmitic acid (1.48 in PBL and 9.61% in SL) and linoleic acid (62.47 in PBL and 49.58% in SL). Peonidin 3-caffeoylsophoroside-5-glucoside, peonidin-3-(6',6'-caffeoylferuloylsophoroside)-5-glucoside, peonidin-dicaffeoylsophoroside-5-glucoside, peonidin 3-(6', 6''-caffeoyl-p-hydroxybenzoylsoph) -5-glucoside were identified as the major anthocyanin compounds in PFSPE. Different levels (200 ppm, 500 ppm, 1000 ppm) of PFSPE were added into both SL and PBL-based emulsion, with 200 ppm catechin as comparison. Oxidation was monitored by measuring the peroxide value and thiobarbituric acid reactive substances. The antioxidant activity of PFSPE increased with an increased concentration, the concentration of 1000 ppm showed high antioxidant ability similar as catechin in both PBL and SL-based O/W emulsion. It is notable that SL-based emulsion appeared better oxidative stability than PBL-based emulsion.
Authors:
Lu-Jing Gan; Dan Yang; Jung-Ah Shin; Sun-Ju Kim; Soon-Taek Hong; Jeung Hee Lee; Chang-Keun Sung; Ki-Teak Lee
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-26
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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