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Effect of Addition of Egg Yolk Lecithin on the Lipid Oxidation of a Water/canola Oil Emulsion

달걀 노른자위 레시틴의 첨가가 물/카놀라 기름 에멀션의 지방질 산화에 미치는 영향

  • Choe, Jeesu (Department of Food and Nutrition, Inha University) ;
  • Choe, Eunok (Department of Food and Nutrition, Inha University)
  • 최지수 (인하대학교 식품영양학과) ;
  • 최은옥 (인하대학교 식품영양학과)
  • Received : 2015.07.02
  • Accepted : 2015.09.04
  • Published : 2015.10.31

Abstract

Effect of the addition of egg yolk lecithin at a concentration of 350 mg/kg on iron-catalyzed autoxidation and chlorophyll-photosensitized oxidation of a water/canola oil emulsion (W/O) during storage at $25^{\circ}C$ was studied based on headspace oxygen consumption and hydroperoxide production. Changes in the phospholipid (PL) composition of the emulsion were determined by high performance liquid chromatography. Headspace oxygen consumption and hydroperoxide content of the emulsion increased with storage time, and addition of egg yolk lecithin did not have any significant effect on these parameters during iron-catalyzed autoxidation and chlorophyll-photosensitized oxidation of the emulsion. PL content of the emulsion decreased during both oxidations, and the degradation rate was higher during autoxidation than during photosensitized oxidation. Phosphatidylcholine content ratio tended to increase during autoxidation. The results suggest that egg yolk lecithin in canola oil emulsion behaves differently during iron-catalyzed autoxidation and chlorophyll-photosensitized oxidation.

350 ppm 농도로 물/카놀라 기름 에멀션에 첨가된 달걀 노른자 위 레시틴은 에멀션 기름의 철 이온에 의한 자동산화와 클로로필에 의한 감광산화에 유의한 영향을 나타내지 않았다. 에멀션의 산화 중 달걀 노른자위 레시틴으로부터 유래한 인지방질은 분해되었으며 감광산화에 비해 자동산화에서 분해 속도가 높았다. 그러나 PC와 PE 사이의 분해 속도는 두 종류의 산화에서 모두 유의한 차이를 보이지 않았다(p>0.05).

Keywords

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