Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Antioxidative Activities and Nitrite Scavenging Abilities of Extracts from Ulmus devidiana

느릅나무 추출물의 항산화 효과 및 아질산염 소거능

  • 이영주 (대구가톨릭대학교 식품공학과) ;
  • 한준표 (대구가톨릭대학교 식품공학과)
  • Published : 2000.10.01
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Abstract

To measure antioxidative activities, the various extracts from Ulmus devidiana were examined in oil emulsion. Water, ethanol, methanol and butanol were used as extract solutions. The activity oxygen species ($H_2O_2,-OH,\;KO_2$) bound the extracts for antioxidative activities were excellent. The extracts bound $Fe^{2+}$ ion and $Cu^{2+}$ ion showed effective antioxidative activities and strong chelating effects. The concentration of $Fe^{2+}$ ion and total ion in ethanol and methanol extracts from Ulmus devidiana root parts (Chinese) were higher than those of the other products. The highest superoxide dismutase-like activities showed butanol extracts from Ulmus devidiana root parts (Chinese) and water extracts from Ulmus devidiana bark parts (Korean). Electron donating abilities and nitric scavenging abilities of ethanol, methanol and butanol extracts were higher than those of water extracts. The nitrite scavenging abilities also reached the maximum at pH 1.2 and the minium at pH 6.0.

Oil emulsion에 느릅나무 근피(한국산, 중국산), 수피(한국산) 각 추출물 0.05% 첨가에 의한 항산화 작용의 실험 결과는 다음과 같다. 활성 산소종, 금속이온 참가에 따른 지방 산화 억제능은 근피, 수피 각 용매 추출물의 $H_2O_2,-OH,\;KO_2$에 대한 포집능은 모두 우수하여 높은 항산화 효과를 나타내었으며, 각 추출물과 $Fe^{2+}$ ion과 $Cu^{2+}$ ion도 강한 활성 유리 라디칼 포집능으로 우수한 항산화 효과를 보였다. 지방 산화를 촉진하는 nonheme iron 함량에서 $Fe^{2+}$ 함량과 total iron 함량은 근피(중국산) 에탄올, 메탄올 추출물이 가장 높은 함량을 나타내었고, 한국산 근피, 수피의 에탄올, 메탄올 그리고 부탄올 추출물군에서 80% 이상의 높은 활성을 보였고, 물 추출물군의 경우 20~55%의 범위로 낮은 효과를 보였다. SOD 유사활성은 근피(중국산) 부탄올 추출물, 수피(한국산) 물 추출물에서 가장 높은 활성능을 보였다. 아질산염 소거능의 경우도 근피, 수피 에탄올, 메탄올 그리고 부탄올 추출물군 모두 우수한 소거능을 보였고, 특히 pH 1.2에서는 가장 높은 아질산염 소거능을 보였으며, pH 6.0으로 갈수록 급격히 감소하였다.

Keywords

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