In this study, Pyracantha angustifolia (Franch.) C. K. Schneid was extracted with 70% methanol at room temperature for 48 hrs and concentrated under reduced pressure to measure its total polyphenol contents; furthermore, the effect of electron donating ability was examined. Methylene chloride, ethyl acetate, and methanol were used to fractionate the extract to testify total polyphenol contents, electron donating abilities, the removal abilities of superoxide radical as well as hydrogen peroxide. The total polyphenol contents were 2007.30±109.28 μg GAE/mL in 70% methanol extract, 273.39±10.19 μg GAE/mL in methylene chloride fraction, 80.57±0.64 μg GAE/mL in ethyl acetate fraction, and 1,160.87±44.71 μg GAE/mL in methanol fraction. The total polyphenol contents showed significant differences (p<0.05) between the solvents. The electron donating ability was 79.07±7.31% for 70% methanol extract, 22.34±0.64% for methylene chloride fraction, 5.33±0.28% for ethyl acetate fraction, and 32.26±1.10% for methanol fraction. The electron donating abilities were significantly different(p<0.05) between the solvents. The removal ability of superoxide radical was 0.018±0.003 for 70% methanol extract, 0.007±0.002 for methylene chloride fraction, 0.0147±0.003 for ethyl acetate fraction, and nothing for methanol fraction. The measurement of hydrogen peroxide decomposition was 0.022±0.0046 for 70% methanol extract, 0.0027±0.0015 for methylene chloride fraction, 0.0037±0.0012 for ethyl acetate fraction, and 0.0009±0.0001 for methanol fraction.

서 론
 재료 및 방법
  1. 실험재료, 시약 및 기구
  2. 실험방법
  3. 통계처리
 결과 및 고찰
  1. 총 폴리페놀 함량
  2. 전자공여능 측정(Electron donating ability measurement)
  3. Superoxide 제거능 측정
  4. Hydorgen peroxide 제거능 측정
 요약 및 결론
 감사의 글
 References

• 이광수(장안대학교 건강과학부 식품영양과) | Kwang-Soo Lee (Dept. of Food & Nutrition, Jangan University) Corresponding author