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Characterization of endogenous antioxidant attributes and its influence on thermal stability of canola oil

机译：内源性抗氧化属性的表征及其对油菜油热稳定性的影响

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摘要

Difference in thermal stability of two commercially available canola oils prepared by either expeller-extraction (EE) or solvent-extraction (SE) method was investigated. After 5 days consecutive deep-fry, content of oxidized-triacylglycerols (oxTAGs) in SE oil increased by 250.0% compared to its original status. However, 62.5% increase of oxTAGs in EE oil occurred, indicating that EE oil exhibits superior thermal stability to SE oil. Antioxidant capacity of EE oil was highly retained and loss rate of tocopherols in EE oil was much slower than in SE oil during deep-fry. Lipidomics showed that although there was no significant difference in molecular profile of either triacylglycerols or diacylglycerols between two oils, EE oil was characterized with 19 times higher phosphatidylcholine contents than SE oil. Considering no difference in antioxidant capacity between the two oils in their original status, it is proposed that synergetic mechanism is simultaneously initiated by antioxidant compounds and phosphatidylcholines, which plays key roles for maintaining better thermo-stability of vegetable oil during deep-fry.
机译：研究了通过排出萃取（EE）或溶剂 - 萃取（SE）方法制备的两种市售水溶花油的热稳定性差异。连续5天后，与其原始地位相比，SE油中氧化 - 三酰基甘油（OXTAG）的含量增加了250.0％。然而，EE油中的oxtags增加了62.5％，表明EE油对SE油表现出优异的热稳定性。 EE油的抗氧化能力高度保留，并且EE油中生育酚的损失率比深铬在SE油中慢得多。脂多元族菌表明，尽管两种油之间的三酰基甘油或二酰基甘油的分子曲线没有显着差异，但EE油的特征在于磷脂酰胆碱含量高于SE油。考虑到其原始地位的两种油之间的抗氧化能力的差异，提出了协同机理通过抗氧化剂化合物和磷脂酰胆碱同时引发，这起到了在深油炸过程中保持植物油的更好热稳定性的关键作用。

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  • 来源
    《RSC Advances》 |2018年第63期|共8页
  • 作者

    Shang Wenting; Dong Huijuan; Strappe Padraig; Zhou Zhongkai; Blanchard Chris;

  • 作者单位

    Tianjin Univ Sci &

    Technol Sch Food Engn &

    Biotechnol Key Lab Food Nutr &

    Safety Minist Educ Tianjin 300457 Peoples R China;

    Tianjin Univ Sci &

    Technol Sch Food Engn &

    Biotechnol Key Lab Food Nutr &

    Safety Minist Educ Tianjin 300457 Peoples R China;

    Cent Queensland Univ Sch Med &

    Appl Sci Rockhampton Qld 4700 Australia;

    Tianjin Univ Sci &

    Technol Sch Food Engn &

    Biotechnol Key Lab Food Nutr &

    Safety Minist Educ Tianjin 300457 Peoples R China;

    Charles Sturt Univ ARC Ind Transformat Training Ctr Funct Grains Wagga Wagga NSW 2678 Australia;

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  • 正文语种 eng
  • 中图分类 化学;
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