식량위기와 환경문제를 해결할 대안으로 미래의 식량자원이자 고부가가치 식 품인 곤충에 대한 관심이 증대되고 있다. 벼메뚜기(Oxya chinensis sinuosa)는 청정 지역에서만 자라는 곤충으로 예로부터 구황식품으로 이용하여 왔고 식품공전에 식품으로 등재되어 있다. 벼메뚜기는 영양성분을 다량 함유하고 있으며 아미노산 조성이 동물성 식품에 비해 낮지 않으며 고단백 식품으로 가치가 인정되고 있으나 현재까지 벼메뚜기를 이용한 식품이 다양하지 않아 벼메뚜기를 이용한 가공식품 개발이 필요한 실정이다. 따라서 본 연구에서는 벼메뚜기의 최적 추출 조건에 따른 항산화활성과 아질산염소거능을 연구하여 가공식품 개발에 기초자료를 제공하고 자 한다. 시험에는 벼메뚜기의 성충을 동결건조 하였고 추출용매는 주정과 증류수 를 이용하였다. 일반성분 분석 결과 수분 7~10%, 조단백 46~54%, 조지방 7~10%, 조회분 1.5~2.9%로 나타났다. 벼메뚜기는 70% 주정 추출물에서 70~92%의 높은 항산화활성을 보였으며 수컷보다 암컷에서 높게 나타났다. 아질산염소거능은 pH 가 낮을수록 수컷보다 암컷에서 높은 경향을 나타냈다.
Background : Korea ginseng root has been traditionally used as a tonic as it is stated to have the capacity to normalize body functions and strengthen systems that are caused by various stresses. But, white ginseng (WG) has lower antioxidant activity than other medicinal crops. Omija (Schisandra chinensis Baillon) has various physiological functionalities such as anti-cancer, anti-inflammatory, and antioxidant activities, which have the effective components of Omija are lignans (schizandrins and gomisins), and this components were contented mostly in seed part on Omija. Physiological characteristics of WG extracts were investigated by adding Omija to enhance functionality.
Methods and Results : WG extract were prepared by adding 0, 20, 40, 60, 80 and 100% of Omija to the weight of WG. Physiological characteristics of WG extracts were investigated DPPH radical scavenging activity, FRAP, and nitrite scavenging activity. As the amount of Omija added increased, DPPH radical scavenging activity of WG extract increased proportionally. IC50 of 10 times water extracts were 0.455, 0.028 and 0.041 ml/ml on WG (100WG), WG added 50% Omija (50OM50WG), and Omija (100OM0WG), respectively. On the other hand, FRAP of extracts decreased slightly with increasing amount of Omija. Nitrite scavenging activity of Omija extract were significantly more active than WG extract, exhibited to 88.89% and 72.65% on WG extract added with 40% Omija (40OM60WG) and non added (100WG), respectively, pH 1.2. and then, to 33.45% and 1.38% with 40OM60WG and 100WG extract, respectively.
Conclusion : From the above results, we may suggest that WG extracts by adding Omija increased the DPPH radical scavenging activity, nitrite scavenging activity and the preference degree on taste.