Open AccessEffects of 1,2-dioleoyl-sn-glycero-3-phosphocholine on moisture content and oxidative stability in soybean oil–water system at different interfaces
Author(s) -
Yong-Jun Kwon,
Seungbeen Jo,
HeeSun Na,
SungHwa Kim,
MiJa Kim,
JaeHwan Lee
Publication year - 2019
Publication title -
food science and biotechnology/food science and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.595
H-Index - 38
eISSN - 2092-6456
pISSN - 1226-7708
DOI - 10.1007/s10068-019-00676-8
Subject(s) - tocopherol , chemistry , oxidative phosphorylation , water content , soybean oil , food science , moisture , irradiation , antioxidant , chromatography , vitamin e , biochemistry , organic chemistry , physics , geotechnical engineering , nuclear physics , engineering
Effects of 1,2-dioleoyl- sn -glycero-3-phosphocholine (DOPC) on the oxidative stability were determined in soybean oil-water system at different locations including at the interface of air-oil, in the middle of oil, and at the interface of oil-water. Also, profile changes of tocopherols were determined during UV irradiation for 18 days. Although no significant changes in tocopherol profiles were observed at three different locations irrespective of DOPC from 0 to 1250 μmol/kg oil, addition of DOPC increased total tocopherols, α-tocopherol, and δ-tocopherol whereas content of β + γ tocopherols did not increase at any locations. Moisture content in water-oil interface was higher than other locations while those were not consistent at different DOPC concentration. Added DOPC significantly decreased oxidative stability from 250 to 830 μmol/kg oil compared to controls ( p < 0.05) whereas 1250 μmol/kg oil DOPC increased oxidative stability. Stabilities of tocopherols especially α-tocopherol were lower in oil-water system than those in bulk oil at UV irradiation.