The quality and antioxidant characteristics of apios (Apios americana Medikus) according to different harvest periods and steaming treatment were investigated. The quality and antioxidant characteristics of apios were significantly different depending on harvest periods. Total starch contents was higher in 1st harvesting period as 62.32 g/100 g than other harvesting period. The water binding capacity and water solubility index was higher in 1st harvesting period as 228.65 and 11.29% than other harvesting period. The sucrose and total free sugar contents were 3.64~8.67 and 4.49~9.54 g/100 g, respectively. Total polyphenol and flavonoid contents of apios was the highest 2nd and 4th harvesting period at 4.21 mg GAE/g and 611.11 μg CE/g, respectively. DPPH radical scavenging activity was higher in 1st harvesting period as 84.96 mg TE/100 g than other harvesting period, and decreased as the harvest periods were delayed. ABTS radical scavenging activity and ferric-reducing antioxidant power were 43.81~47.89 mg TE/g and 231.20~264.07 mM/100 g, and increased to 50.58~51.44 mg TE/g and 342.55~384.29 mM/100 g after heat treatment. As a result, it is thought that studies on change of quality and physicochemical characteristics according to cultivation characteristics should be preceded for cultivation stability of apios.

Abstract
서 론
재료 및 방법
    1. 실험재료
    2. 아피오스의 품질특성 분석
    3. 아피오스의 총 폴리페놀 및 플라보노이드 함량 분석
    4. 아피오스의 radical 소거활성 및 FRAP 활성 측정
    5. 통계분석
결과 및 고찰
    1. 수확시기 및 증자처리에 따른 아피오스의 품질특성
    2. 수확시기 및 증자처리에 따른 아피오스의 총 폴리페놀및 플라보노이드 함량
    3. 수확시기 및 증자처리에 따른 아피오스의 항산화활성
    4. 아피오스의 품질 및 항산화특성 간의 상관관계
요약 및 결론
감사의 글
References

• 황엄지(농촌진흥청 국립식량과학원 농업연구사) | Eom-ji Hwang (Researcher, National Institute of Crop Science, Rural Development Administration, Muan 58545, Korea)
• 김세희(농촌진흥청 국립식량과학원 전문연구원) | Sehee Kim (Master’s Degree Researcher, National Institute of Crop Science, Rural Development Administration, Muan 58545, Korea)
• 김현주(농촌진흥청 국립식량과학원 농업연구사) | Hyun-Joo Kim (Researcher, National Institute of Crop Science, Rural Development Administration, Muan 58545, Korea)
• 정재희(농촌진흥청 국립식량과학원 농업연구사) | Jaehee Jeong (Researcher, National Institute of Crop Science, Rural Development Administration, Muan 58545, Korea)
• 이영훈(농촌진흥청 국립식량과학원 농업연구관) | Yeong Hoon Lee (Senior Researcher, National Institute of Crop Science, Rural Development Administration, Muan 58545, Korea)
• 하태정(농촌진흥청 국립식량과학원 농업연구관) | Tae Joung Ha (Senior Researcher, National Institute of Crop Science, Rural Development Administration, Muan 58545, Korea)
• 우관식(농촌진흥청 국립식량과학원 농업연구관) | Koan Sik Woo (Senior Researcher, National Institute of Crop Science, Rural Development Administration, Muan 58545, Korea) Corresponding Author