오미자의 이화학적 특성 및 항산화 활성 = Physicochemical Properties and Antioxidative Activities of Omija(Schizandra chinensis Bailon)

다국어 초록 (Multilingual Abstract)

To develop physiological functionality of Omija extracted with water was evaluated on antioxidative activity. Omija, high acid material with pH 3.6, contain 57.5±1.03% of moisture, and 18.8±0.12% of crude fat. This material have 12.6±0.04% of carbohydrate and 11.1±0.07% of crude protein as well, but ash and crude protein contents were found less than 10%. 10 mineral contents were also found, too; K and Ca showed the highest level, then Al, Mg, Na and Mn were followed. In composition amino acid contents, glutamic acid took the largest portion, 131.7±1.3 ㎎/100 g, aspartic acid 51.5±0.6%, and other composition amino acid under 50%. In case of free sugar contents, 7 types were found. Most of them were glucose and fructose. Total phenolic compounds showed the highest level, 2,862.6±31.7 ㎎/100 g. 197.8±14.6 ㎎/100 g of flavonoid and 225.6±18.2 ㎎/100 g were included. In terms of electron donating ability, radical scavenging ability activated as the amount of Omija extract increased. In particular, Omija extract in 1,000 ㎍/㎖ demonstrated almost similar electron donating ability, 72.4±0.21%, to BHT. It was also found that antioxidant activities of electron donating ability, SOD-like ability, hydroxyl radical scavenging ability and nitrite scavenging ability were highly promoted as Omija extract concentration increased. The nitrite scavenging ability was significant when the extract belonged to strong acid region and doping concentrations increased.

국문 초록 (Abstract)

오미자의 기능성 식품 개발을 위한 기초자료를 얻고자 오미자를 물로 추출하여 이화학적 특성과 항산화 활성을 측정하였다. 오미자의 수분 함량은 57.5±1.03%로 가장 높은 함량을 보였고, 조지방(18.8±0.12%)>탄수화물(12.6±0.04%)>조단백질(11.1±0.07%)>회분조섬유(4.9±0.03～5.4±0.03%)순으로 검출되었다. 무기질은 10종이 검출되었으며, K와 Ca의 함량이 가장 높게 나타났고, Al, Mg, Na 및 Mn 순이었으며, 구성 아미노산 함량은 glutamic acid가 131.7±1.3 ㎎/100 g으로 가장 높게 검출되었고, aspartic acid가 51.5±0.6%였으며, 다른 무기질은 50% 미만의 함량을 나타내었다.
유리당은 7종이 검출되었고, glucose와 fructose가 대부분을 차지하였으며, 총 페놀 화합물은 2,862.6±31.7 ㎎/100 g으로 높은 함량을 나타내었고, 플라보노이드 197.8±14.6 ㎎/100 g, 안토시아닌 225.6±18.2 ㎎/100 g으로 측정되었다. 전자공여 작용은 오미자 추출물의 첨가 농도가 증가할수록 radical 소거능이 높게 나타났으며, 특히 1,000 ㎍/㎖에서 오미자 추출물은 72.4±0.21%로 BHT와 비슷한 전자공여 작용을 보였다. 환원력, SOD 유사 활성과 hydroxyl radical 소거 작용도 오미자 추출물의 농도가 증가할수록 항산화 활성이 높게 나타났으며, 아질산염 소거능은 pH가 산성영역일수록, 첨가농도가 증가할수록 유의적으로 높게 나타났다.

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