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Changes in Nutraceutical Lipid Constituents of Pre- and Post-Geminated Brown Rice Oil

발아 전후 현미유에서의 기능성 지질성분 변화

  • Kwak, Ji-Eun (National Institute of Crop Science, Rural Development Administration) ;
  • Yoon, Sung-Won (Dept. of Food and Nutrition, Korea University) ;
  • Kim, Dae-Jung (National Institute of Crop Science, Rural Development Administration) ;
  • Yoon, Mi-Ra (National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Jeong-Heui (National Institute of Crop Science, Rural Development Administration) ;
  • Oh, Sea-Kwan (National Institute of Crop Science, Rural Development Administration) ;
  • Kim, In-Hwan (Dept. of Food and Nutrition, Korea University) ;
  • Lee, Jun-Soo (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Lee, Jeom-Sig (National Institute of Crop Science, Rural Development Administration) ;
  • Chang, Jae-Ki (National Institute of Crop Science, Rural Development Administration)
  • 곽지은 (농촌진흥청 국립식량과학원) ;
  • 윤성원 (고려대학교 식품영양학과) ;
  • 김대중 (농촌진흥청 국립식량과학원) ;
  • 윤미라 (농촌진흥청 국립식량과학원) ;
  • 이정희 (농촌진흥청 국립식량과학원) ;
  • 오세관 (농촌진흥청 국립식량과학원) ;
  • 김인환 (고려대학교 식품영양학과) ;
  • 이준수 (충북대학교 식품공학과) ;
  • 이점식 (농촌진흥청 국립식량과학원) ;
  • 장재기 (농촌진흥청 국립식량과학원)
  • Received : 2013.08.09
  • Accepted : 2013.09.11
  • Published : 2013.09.30

Abstract

This study investigated the changes in the nutraceutical lipid components of brown rice oil after germination. Four different high-yielding cultivars (Dasan1, Segyejinmi, Hanareum1 and Hanareum2) of Korean brown rice were selected and brown rice oil was extracted from each cultivar before and after germination. Free fatty acid, squalene, policosanols, and isomers of phytosterol were analyzed using GC, and isomers of tocols (tocopherol and tocotrienol) and ${\gamma}$-oryzanol were quantified using HPLC from both brown rice oil (BRO) and germinated brown rice oil (GBRO). The contents of phytosterol isomers, campesterol, stigmasterol, and ${\beta}$-sitosterol were increased by 8.3%, 31.6%, 3.3% in GBRO, respectively. Furthermore, the squalene content showed the highest increase of up to 2.4 fold in GBRO compared to BRO. In addition, linoleic and linolenic acid composition increased whereas oleic and palmitic acid decreased in the GRBO. However, the contents of tocols (tocopherol and tocotrienol) in GBRO were lower than those in BRO, and there was no significant difference in policosanol and ${\gamma}$-oryzanol between GBRO and BRO. These results suggest that GBRO has the potential as a healthy and functional source due to its lipid profile on improved lipid metabolism.

Keywords

References

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