In this study, the antioxidant and tyrosinase inhibitory activities of aqueous ethanolic extract from the immature fruits of Malus pumila cv. Fuji were evaluated. The antioxidant capacities of the extract was investigated employing radical scavenging assays using DPPH and ABTS+ radicals. The skin-whitening effect of M. pumila cv. Fuji extract was tested using mushroom tyrosinase assay. In addition, the total phenolic content was measured by a spectrophotometric analysis. All tested samples showed a dose-dependent radical scavenging and tyrosinase inhibitory activities. Among the tested samples, the ethyl acetate (EtOAc)-soluble portion from the immature fruits of M. pumila cv. Fuji was showed the significant DPPH and ABTS+ radicals scavenging activities. Also, the tyrosinase inhibitory activity of the ethyl acetate (EtOAc)-soluble portion from immature apples was higher than other solvent-soluble portion. These results suggest that unripe fruits of M. pumila cv. Fuji could be considered as a new valuable source of natural antioxidant and skin-whitening agents. Systematic investigation of immature fruits of Malus pumila cv. Fuji will be performed for the further development of its biological properties.

서 론
 재료 및 방법
  실험재료
  추출물의 제조 및 분획
  DPPH 라디칼소거능 측정
  ABTS+ 라디칼 소거능 측정
  Tyrosinase 저해활성 측정
  총페놀성 화합물 함량 평가
 결과 및 고찰
  DPPH 라디칼 소거활성
  ABTS+ 라디칼 소거능 측정
  Tyrosinase 저해활성
  총페놀 화합물 함량
 요 약
 References

• 권오준((재)경북지역사업평가단 평가팀) | O Jun Kwon Corresponding Author