In this study, hot water and ethanol, acetone, and hexane extracts of the steamed Deodeok were investigated for use as raw materials for natural cosmetics. Hot water and ethanol, acetone and hexane extracts of steamed Deodeok did not indicate cell toxicity up to 300 μg/mL concentration in the MTT assay. The tyrosinase inhibition effects of the ethanol extract were higher than the ascorbic acid. The efficacy of the steamed Deodeok's ethanol extract on the elastase inhibition was similar to that of quercetin at higher concentrations. In conclusion, water, ethanol, acetone and hexane extracts of the steamed Deodeok indicated strong possibility as a whitening and anti-wrinkle functional cosmetic ingredient. Among them, the steamed Deodeok's ethanol extract, which showed excellent activity, is highly available because it has high safety compared to other organic solvent extraction methods used in cosmetics, and has minimal irritation to the skin.

Abstract
서 론
재료 및 방법
    1. 추출물의 조제 및 시약
    2. MTT assay
    3. 아질산염(nitrite) 소거능
    4. Tyrosinase 저해활성
    5. Elastase 저해활성
    6. Collagenase 저해활성
    7. 통계처리
결과 및 고찰
    1. MTT assay를 이용한 추출액의 세포독성조사
    2. 아질산염 소거능
    3. Tyrosinase 활성 억제 효과
    4. Collagenase 저해 효과
    5. Elastase 저해능
요약 및 결론
References

• 이희경(청솔식품연구소) | Hee-Gyeong Lee (Cheongsol Food R & D, Agricultural Company)
• 최온유(청솔식품연구소) | On-Yu Choi (Cheongsol Food R & D, Agricultural Company)
• 최두복(조선대학교 신산업융합학부) | Du-Bok Choi (Dept. of Advanced Industry Convergence, Chosun University)
• 최현숙(충청대학교 식품영양외식학부) | Hyun-Suk Choi (Dept. of Food Nutrition and Food Service, Chungcheong University) Corresponding author