본 연구는 감태 분말을 0(S1), 2(S2), 4(S3), 6(S4), 8(S5)% 비율로 첨가한 크래커를 제조한 뒤 항산화 활성과 품질 특성을 측정하였다. 색도 측정 결과, L값과 b값은 감태 첨가량이 증가할수록 감소하였다(p<0.001). a값은 음(-)의 값을 보였는데, S4가 -8.03으로 가장 낮은 값을 보였고, 경향성은 나타나지 않았다. pH는 첨가량이 증가할수록 값이 감소하였고, 퍼짐성은 첨가량에 따른 유의성이 나타나지 않았다. 텍스쳐 측정 결과, 첨가량이 증가함에 따라 값이 증가하는 경향을 보였다(p<0.001). 관능검사는 색, 향, 맛, 외관, 조직감, 전반적인 기호도 항목을 평가하였다. 그 결과, 대조군보다 감태를 첨가한 샘플에서 더 높은 기호도 값을 보였고, S4(6% 첨가)가 기호도가 가장 좋았다. 감태 크래커는 분말 첨가량이 증가할수록 DPPH radical 소거능과 환원력이 유의적으로 높게 나타났다(p<0.001). 또한, 총 페놀 함량은 분말 첨가량이 증가할수록 높아졌다(p<0.05). 이를 통해 감태 크래커의 항산화 활성은 감태 첨가량이 증가할수록 높아진다는 것을 알 수 있다.
Ecklonia cava which is a kind of phaeophyta and belongs to Laminariales Alariaceae is a perennial seaweed distributed over Jeju and Dokdo islands. The purpose of this study evaluate antioxidant activities of Ecklonia cava crackers. Crackers were prepared with different measurements (0, 2, 4, 6, 8 g) of Ecklonia cava; indicated as S1, S2, S3, S4 and S5, and are used to examine and compare antioxidant activities, and quality characteristics. Ecklonia cava powder was used, after being extracted with 70% ethanol in hot water and done in freeze dehydration. To examine antioxidant activities of Ecklonia cava and cracker, DPPH radical scavenging activity, total phenolic and reducing power were tested. Total phenolic content was 36.86 mg GAE/g. DPPH radical scavenging activity and reducing power showed good vitality as amounts of Ecklonia cava powder increased (p<0.001). pH level decreased as amounts of power increased. L (lightness) values and b (yellowness) values decreased with an increased concentration of Ecklonia cava powder (p<0.001), whereas (redness) values didn’t show tendency. S5 indicated the lowest spreadness. According to sensory evaluation, S4 (6 g) was preferred the most in terms of color, flavor, taste, appearance, texture, and overall palatability. Results suggest that Ecklonia cava powder has antioxidant effect and is useful as a functional food resource.