Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Total Polyphenol Contents, Flavonoid Contents, and Antioxidant Activity of Roasted-flaxseed Extracts Based on Lactic-acid Bacteria Fermentation

유산균 발효에 따른 볶은 아마씨 추출물의 폴리페놀, 플라보노이드 함량 및 항산화 활성

  • Received : 2017.11.20
  • Accepted : 2018.05.03
  • Published : 2018.05.30
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Abstract

Flaxseed (Linum usitatissimum L.), also called linseed and one of the raw materials for making linen, is rich in omega-3 fatty acids, vegetable estrogen, ${\alpha}$-linolenic acid, and dietary fiber. Studies on flaxseed have reported various additional effects, such as the inhibition of cholesterol, blood clotting, and tumor growth. In this study, we investigated the functional components of flaxseed fermented with lactic-acid bacteria. Lactic-acid bacteria was inoculated into heat-treated (roasted) flaxseed and fermented at $37^{\circ}C$ for 72 hr. The fermented flaxseed was extracted with 70% ethanol and the antioxidant effect of the fermented extracts according to the lactic-acid bacteria was analyzed. It was confirmed that the total polyphenol contents had expanded by about 1.5-8 times, and the total flavonoid contents had increased around 1.2 times in the case of fermented flaxseed with lactic-acid bacteria compared to non-fermented flaxseed (NFFS). DPPH radical scavenging and superoxide dismutase-like activities had increased around 5.6 and 2.3 times, respectively, in the fermented flaxseed compared to the NFFS at 100 ppm concentration. The study concluded that fermentation of flaxseed with lactic-acid bacteria is possible and that it is effective to increase the antioxidant effects of flaxseed. These results can be applied to the development of improved foods and cosmetic materials.

아마(Linum usitatissimum L.)의 종자인 아마씨(Flaxseed)는 아마인(仁)이라고도 불리며 오메가-3 지방산, 식물성 에스트로겐, 알파-리놀렌산 및 식이섬유가 풍부하게 함유되어 있다. 또한 콜레스테롤 저해, 혈액응고 저해, 종양의 성장 억제 등 다양한 효과에 대한 다양한 연구가 보고 되어있다. 본 연구는 유산균을 이용해 발효한 아마씨의 기능성 성분을 조사하기 위해 가열 처리된(볶은) 아마씨에 4종의 유산균(NFFS ; Non-fermented flaxseed, BHN-LAB31, 126 ; Lactobacillus brevis, BHN-LAB41 ; Pediococcus pentosaceus, KCTC3109 ; Lactobacillus casei)을 접종하여 $37^{\circ}C$에서 7일 동안 발효를 진행하였고, 발효 후 70% 에탄올을 통해 추출하여 각 발효 유산균에 따른 추출물의 항산화 활성을 측정하였다. 그 결과, 발효하지 않은 아마씨(NFFS)에 비해 유산균 발효 아마씨에서 전반적으로 총 폴리페놀 함량 약 1.5~8배, 총 플라보노이드 함량 약 1.2배 증가된 것을 확인하였다. DPPH radical 소거 활성능은 100 ppm 농도에서 비 발효 아마씨 대비 5.6배, SOD 유사활성능은 2.3배 증가하는 것을 확인하였다. 이러한 연구결과를 종합하여 볼 때 유산균을 이용한 아마씨의 발효가 가능하며, 유산균 발효가 아마씨의 항산화능 증대에 효과적인 것을 확인하였으며 본 연구를 기반으로 한 기능성 식품 또는 화장품 소재로의 개발 및 응용이 가능할 것으로 기대된다.

Keywords

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