Abstract
The antioxidant activity of ground red pepper, ethyl alcohol extracts of ground red pepper peel and alcohol extracts plus organic acid was studied by using edible soybean oil as a substrate. All the substrates were stored in a dark place at $45.0{\pm}0.5^{\circ}C$ respectively. The results of the study were as follow: 1. Ground red pepper, black pepper and cassia exhibited slight antioxidant activity and there was no significant difference in antioxidant activity among them. 2. Although both ground red pepper peel and red pepper seed showed antioxidant activity, ground red pepper peel exhibited greater antioxidant activity than ground red pepper peel did. 3. Ethyl alcohol extracts of red pepper peel showed strong antioxidant activity, but the residue did not show the antioxidant activity. 4. The antioxidant activity of the ethyl alcohol extracts of red pepper peel increased in direct proportion to the concentration of the extracts. 5. In connection with the synergistic effect of organic acid to the ethyl alcohol extracts of red pepper peel, citric acid showed a very strong synergistic effect on the antioxidant activity of red pepper, while ascorbic acid showed a weak effect. On the other hand, phosphoric acid showed an accelerating effect on the oxidation of oils. 6. The maximum antioxidant activity of the ethyl alcohol of ground red pepper peel was observed at the citric acid concentration of 0.04%, when tested at various concentration of citric acid.
고추분말(粉末), 고추피(皮)의 알코올추출물(抽出物), 알코올추출물(抽出物)과 유기산(有機酸)을 기질(基質)인 식용대두유(食用大豆油)에 첨가(添加)하여 암소저장(暗所貯藏) 조건하(條件下)$(45.0{\pm}0.5^{\circ}C$ 및 $55.0{\pm}0.5^{\circ}C)$에서 과산화물형성(過酸化物形成) 억제효과를 검토한 바, 다음과 같은 결과(結果)를 얻었다. 1) 고추, 후추, 계피분말(粉末)은 모두 어느정도의 항산화효과를 나타냈으며, 이들 간(間)의 항산화효과는 거의 비슷하였다. 2) 고추피(皮)와 고추씨분말(粉末)은 모두 항산화효과를 나타냈으며, 고추피(皮)는 고추씨 분말(粉末)보다 강(强)한 항산화효과를 나타냈다. 3) 고추피(皮)의 알코올추출물(抽出物)의 강(强)한 항산화효과를 나타냈으며, 잔사(殘渣)는 거의 항산화효과를 나타내지 못하였다. 4) 고추피(皮)의 알코올추출물(抽出物)의 항산화효과는 알코올추출물(抽出物)의 농도가 짙을수록 거의 비례(比例)해서 강(强)하게 나타났다. 5) 고추피(皮)의 알코올추출물(抽出物)과 유기산(有機酸)의 병용효과는 구연산이 매우 강(强)하게, Vitamin C (ascorbic acid)는 강(强)하게 항산화효과를 나타냈으나, 인산의 경우 오히려 촉진(促進)되었다. 6) 고추피(皮)의 알코올추출물(抽出物) 0.1%와 구연산의 농도(濃度)에 따른 병용효과는 구연산의 농도(濃度)가 0.04%일때 가장 강(强)하게 나타냈다.