The antioxidant activities and total phenolics of four Rosaceae species Pourthiaea villosa (Thunb.) Decne, Sorbus commixta Hedlund, Sorbaria sorbifolia var. stellipila Maxim and Pyrus pyrifolia (Burm.f.) Nakai were determined. Phenolic content (polyphenol and flavonoid), radical scavenging activities [2,2-Diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azino-bis (3-ethylnezthiazoline-6-sulfoic acid) (ABTS)] and ferrous ion chelating effect were evaluated. Total polyphenol and flavonoid contents were highest in Pourthiaea villosa (Thunb.) Decne and lowest in Pyrus pyrifolia (Burm.f.) Nakai. Phenolic contents of Pourthiaea villosa (Thunb.) Decne was 331.45±7.78 and 90.4±3.5 mg·g-1. DPPH and ABTS radical scavenging activities were found to be lowest in Sorbus commixta Hedlund whereas Sorbaria sorbifolia var. stellipila Maxim and Pourthiaea villosa (Thunb.) Decne showed relatively good DPPH and ABTS radical scavenging activities. Ferrous ion chelating effect was highest in Pyrus pyrifolia (Burm.f.) Nakai (1.05±0.04 mg·ml-1) and lowest in Sorbus commixta Hundlund (4.22±0.71 mg·ml-1).

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험재료
  2.2. 추출물 조제
  2.3. 총 폴리페놀 함량 측정
  2.4. 총 플라보노이드 함량 측정
  2.5. DPPH radical 소거활성
  2.6. ABTS radical 소거활성
  2.7. Ferrous ion chelating 효과
 3. 결과 및 고찰
  3.1. 식물 별 페놀성 물질 함량
  3.2. 식물별 radical 소거능 및 ferrous ion chelating
 4. 결론
 참고문헌

• 이준영(동국대학교 경주캠퍼스 신소재화학과) | Jun-Young Lee (Department of Advanced Materials Chemistry, Dongguk University-Gyeongju)
• 김상욱(동국대학교 경주캠퍼스 신소재화학과) | Sang-Wook Kim (Department of Advanced Materials Chemistry, Dongguk University-Gyeongju)
• 유주한(동국대학교 경주캠퍼스 조경학과) | Ju-Han You (Department of Landscape Architecture, Dongguk University-Gyeongju) Corresponding author