유색현미의 발아과정 중 생리활성물질 및 아미노산 함량의 변화양상

서지정보

· 발행기관 : 한국국제농업개발학회
· 수록지 정보 : 한국국제농업개발학회지 / 29권 / 4호
· 저자명 : 천상욱, 박정숙, 김영한, 장기식, 이미경

목차

서 언
재료 및 방법
식물 재료
총 페놀 함량
총 플라보노이드 함량
유리 아미노산 함량
DPPH 활성
아질산염 소거능
결과 및 고찰
총 페놀 함량
총 플라보노이드 함량
아미노산 함량
DPPH 활성
NSA 활성
적 요
ACKNOWLEDGMENTS
REFERENCES

영어초록

The objective of this study was to determine the changes in content of polyphenolics, flavonoids, amino acids, especially γ-aminobutyric acid (GABA), and the antioxidant activities in the methanol extracts of four different pigmented rice seeds (white, black, red, and green color) at different germination stages, dry seeds (DS), imbibed seeds (IS), and germinated seeds for 1 (GS1), 2 (GS2) and 3 days (GS3). Total phenolics content at 1000 mg/kg extract was highest in black rice, ranging from 208.3 to 257.3 mg/kg, and followed by red rice 144.7 to 185.7 mg/kg, brown rice 151.3 to 194.2 mg/kg and green rice 125.7 to 160.7 mg/kg (lowest). Total flavonoid level had same tendency to total phenolics among colored rices with significant differences, showing highest amounts (45.2 to 56.8 mg/kg) in black rice and lowest (18.8 to 23.0 mg/kg) in green rice. Total phenolics and total flavonoids levels in black and brown seeds were highest when soaked, and in red rice when nonsoaked, and in green rice when germinated for 1 day. These results showed that content of physiologically- active substances were differ depending on seed coat color, soaking or germinating degree. Content in total amino acids during germination was ranged from 136.5 to 232.0 mg/kg in green rice (highest), and 98.9 to 176.0 mg/kg in red rice (lowest). Total content of amino acids and GABA level in all seed colors were high in order of GS3 > GS1 > IS > DS. The antioxidant activity of the methanol extracts from all the seed colors concentration-dependently increased. DPPH free radical scavenging activity at 2,000 mg/kg was highest in black rice by 83.0 to 87.7%, and lowest in green rice by 44.3 to 65.7%.

참고자료

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