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레몬그라스 식초의 초산발효 특성과 항산화 활성

Acetic acid fermentation properties and antioxidant activity of lemongrass vinegar

  • 이미란 (제주대학교 생명과학기술혁신센터) ;
  • 강창희 (제주대학교 생명과학기술혁신센터) ;
  • 부희정 (제주대학교 생명과학기술혁신센터)
  • Yi, Mi-Ran (Biotechnology Regional Innovation Center, Jeju National University) ;
  • Kang, Chang-Hee (Biotechnology Regional Innovation Center, Jeju National University) ;
  • Bu, Hee-Jung (Biotechnology Regional Innovation Center, Jeju National University)
  • 투고 : 2017.08.07
  • 심사 : 2017.08.24
  • 발행 : 2017.08.30

초록

본 연구는 제주도에서 재배된 레몬그라스를 활용한 식초의 초산발효 특성과 품질특성 그리고 항산활 활성을 알아보았다. 레몬그라스를 고두밥대비 5% 첨가한 현미주정을 제조한 결과 알코올 함량이 7.2%였다. 여기에 초산균인 Acetobacter sp. RIC-V 종초를 10% 가하여 초산발효하여 레몬그라스 식초를 제조하였다. 초산발효 결과 pH가 3.62에서 3.13으로 낮아졌으며, 총산도는 1.43%에서 7.21%로 증가하였다. 레몬그라스 식초의 유리당 분석결과 fructose가 0.81 g/100 g으로 나타났고, glucose, sucrose, maltose는 검출되지 않았다. 유기산 분석결과는 acetic acid가 3,658.58 mg%로 가장 높았으며, citric acid, lactic acid가 각각 214.66 mg%, 159.44 mg%로 나타났고, malic aicd, tartaric acid, oxalic acid 모두 소량 함유한 것으로 분석되었다. 유리아미노산 분석결과 glutamic acid가 0.233 g/100 g으로 가장 높은 함량을 보였고, histidine, alanine, proline, aspartic acid이 각각 0.129 g/100 g, 0.113 g/100 g, 0.103 g/100 g, 0.069 g/100 g으로 나타났다. 총 폴리페놀 함량 분석 결과는 레몬그라스 식초와 레몬그라스 무첨가 식초가 각각 $568.6{\mu}g\;GAE/mL$, $490.9{\mu}g\;GAE/mL$이며, 레몬그라스 식초에 레몬그라스 분말과 추출물의 첨가량이 높을수록 높아져 레몬그라스 분말 5% 첨가군이 $895.7{\mu}g\;GAE/mL$로 가장 높았다. ABTS 라디칼 소거활성은 레몬그라스 식초와 레몬그라스 무첨가 식초 2.5%농도에서 각각 58.0 43.2%로 분석되었으며, 이 또한 레몬그라스 분말과 추출물의 첨가량이 높을수록 높아져 레몬그라스 분말 5% 첨가군이 91.0%로 가장 높은 저해율을 보였다. 결과 레몬그라스 식초는 총산도 7.21로 높고, 유기산, 아미노산 함량이 우수하며, 항산화 활성이 우수한 것으로 나타나 고품질의 기능성 식초로 활용 가능할 것으로 사료된다.

This study investigated acetic acid fermentation properties and antioxidant activity of vinegar by addition of lemon grass to develop high quality vinegar by using lemongreass. Traditional brown rice wine contained 5% lemongrass powder and had an alcohol content of 7.2%. The wine was fermented by Acetobacter. sp. RIC-V and made into lemongrass vinegar (LV). The pH and total acidity of the LV were 3.13% and 7.21%, respectively. Fructose was detected whereas glucose, sucrose, and maltose were not detected. Among organic acids, acetic acid was highest at 3658.6 mg%; trace amounts of lactic acid, citric acid, malic acid, tartaric acid, and oxalic aicd were detected. Of the 17 free amino acids, glutamic acid, histidine, alanine, and proline were mainly detected. To conduct total polyphenol content and ABTS radical scavenging activity, 3% and 5% lemongrass powder (P3LV, P5LV) and 1%, 2%, and 3% of lemongrass extract (E1LV, E2LV, E3LV) were added to LV, respectively. Total phenolics increased as the added lemongrass powder and extract increased. Total phenolics were 490.9, 559.4, and $895.7{\mu}g$ gallic acid equivalents/mL in brown rice vinegar, LV, P5LV. ABTS radical scavenging activities were 43.2%, 58.0%, and 91.0% in brown rice vinegar, LV, P5LV, respectively. These results show that lemongrass vinegar has considerable potential as a high quality functional vinegar with antioxidative effects.

키워드

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  1. 으뜸도라지 식초의 저장기간별 품질 특성 및 항산화 활성 vol.31, pp.4, 2018, https://doi.org/10.9799/ksfan.2018.31.4.549
  2. Antioxidant and anti-inflammatory activity on sea tangle (Laminaria japonica) adding vinegar vol.26, pp.2, 2017, https://doi.org/10.11002/kjfp.2019.26.2.211
  3. Antioxidant Activities and Quality Characteristics of Sulgidduck with Added Lemongrass (Cymbopogon citratus) Powder vol.31, pp.1, 2017, https://doi.org/10.17495/easdl.2021.2.31.1.72