Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
권호 표지

Antioxidative Effects of Korean Bamboo Trees, Wang-dae, Som-dae, Maengjong-juk, Jolit-dae and O-juk

한국산 왕대, 솜대, 맹종죽, 조릿대 및 오죽의 항산화 효과

  • Lee, Min-Ja (Department of Food and Life Science, Inje University) ;
  • Moon, Gap-Soon (Biohealth Products Research Center supported by MOST & KOSEF, Food Science Institute and School of Food and Life Science, Inju University)
  • 이민자 (인제대학교 식품생명과학과) ;
  • 문갑순 (인제대학교 바이오헬스 소재연구센터, 식품과학연구소)
  • Published : 2003.12.01
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Abstract

Bamboo trees have been used for a long time as folk remedies for treatment of hypertension and stroke symptoms in Oriental regions. These pharmaceutical effects of bamboos look like to be related to its antioxidant capacity and phytochemicals in bamboos. To evaluate the antioxidative effects of bamboo trees, five kinds of bamboo varieties dominant in Korean peninsular were chosen and determined its total antioxidaive activities, free radical scavenging activities and nitrite scavenging activities by TEAC (Trolox Equivalent Antioxidant Capacity) assay, DPPH and Griess reagent assay using in vitro system, respectively. To evaluate the correlation between antioxidative activities and Maillard reaction during hot water extraction, contents of reducing sugar and total nitrogen and brown color intensity at 420 nm were determined. When total antioxidative activities, free radical scavenging activities and nitrite scavenging activities of five kinds of bamboo trees were compared, wang-dae (Phyllostachys bambusoides S. et Z.) showed the strongest effect among samples, although all kinds of extracts showed relatively strong effects against oxidation. The bamboo culms extract showed stronger antioxidative effects than that of bamboo leaves. In each fraction obtained from 70% ethanol extract, antioxidative effect were increased in order of dichloromethane>ethyl acetate>butanol>water>hexane fraction. In reducing sugar analysis of extracts, reducing sugar contents of water extracts were higher than that of 70% ethanol extracts and wang-dae water extract showed the highest level which was 708.92 mg/g. Total nitrogen contents of the extracts were $1.785{\sim}2.605\;mg%$ and contents in water extracts were lower than that in 70% ethanol extracts. Brown color intensity at 420 nm showed similar tendency with results in reducing sugar contents.

국내산 대나무 다섯 종의 줄기와 잎을 열수 및 70% 에탄올로 추출하여 이들의 항산화 효과를 TEAC법을 이용하여 측정한 결과 다섯 종의 대나무 모두 높은 항산화 효과를 보였으나 왕대>조릿대>솜대>맹종죽>오죽의 순으로 TE 값이 높게 나타났다. 줄기와 잎을 비교하였을 때 잎 보다 줄기의 항산화 효과가 높았으며 열수 추출물에서의 항산화능이 70% 에탄올 추출물에서 보다 큰 것으로 나타났다. 한편, 왕대 70% 에탄올 추출물을 용매 극성별로 분획하여 항산화 효과를 측정한 결과 디클로로메탄>에틸아세테이트>부탄올>물>핵산의 순으로 TE 값이 높았는데 특히, 디클로로메탄층의 TE 값은 1.713으로서 다른 식물성 추출물 보다 월등히 높은 것으로 나타났다. DPPH를 이용하여 유리기 소거 효과를 측정한 결과와 nitrite 소거 활성을 측정한 결과도 항산화 효과와 같은 경향을 나타내어서 줄기가 잎보다 높은 소거 활성을 나타내었으며 왕대 용매별 분획물의 활성은 디클로로메탄층에서 가장 높았다. 대나무 열수 추출물의 높은 항산화 효과, 유리기소거 효과 및 nitrite 소거 효과는 메일라드 반응 생성물과 관련이 있을 것으로 여겨져 환원당 함량을 측정한 결과 70% 에탄올 추출물보다는 열수 추출물에서 높게 나타났으며 특히, 왕대 열수 추출물의 환원당 함량이 가장 높았고 조릿대>맹종죽>오죽>솜대의 순이었으며 420nm에서의 갈색도도 이와 같은 경향을 나타내었으며 높은 상관관계를 나타내었다. 따라서, 당 함량이 높은 식물 추출물의 항산화 효과, 유리기 및 nitrite 소거 활성 검정에는 메일라드 반응에 의한 효과가 부가되는 것으로 나타났다.cetone 추출물 200ppm에서 98.19%의 강한 저해효과를 나타내었다.9mg$의 함량으로 S3(279.29mg), S1(188.23mg), S2(180.52mg), S6(179,60mg)의 순으로서 S3(한국하), S1(한국상), S2(한국중)의 순으로 높게 나타났고 한국 말차가 Ca 함량이 더 높았다. Mg의 경우는 시료 100g당 $346.63{\sim}590.03mg$로 S3(590.03mg), S4(530.00mg), S2는 346.63 mg으로 매우 낮은 수치를 나타내었다. P의 함량은 S4 (398.47mg), S5(373.90mg), S6(371.55mg), S2(355.40mg), S1(346.66mg), S3(237.38mg)의 순으로서 $237.38{\sim}398.47mg$의 분포를 보여 S4(일본 상), S5(일본 중)의 순서로 높게 나타났다. Na은 $141.78{\sim}231.54mg/100g$로서 S2(231.54mg), S1(292.95mg), S5(191.31mg)로 의 순으로 한국산 말차에 함량이 높았고, K은 $1,357.70{\sim}2,716.12mg/100g$으로 S4(2,716.12mg), S5(2,254.20mg), S6(2,221.45mg), S1(2,148.16mg), S2(1,842.36mg), S3(1,357.70mg)의 순으로 일본산이 훨씬 높은 함량을 나타내었으며, Fe함량은 $17.60{\sim}24.34\;mg/100g$으로서 S6 (24.34mg), S5(21.

Keywords

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