Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Effect of lotus leaf on the quality characteristics and antioxidant properties of bread

연잎 첨가가 제빵 특성 및 항산화 활성에 미치는 영향

  • Park, La-Young (Department of Food Science and Technology, Catholic University of Daegu)
  • 박나영 (대구가톨릭대학교 식품공학전공)
  • Received : 2016.12.12
  • Accepted : 2017.03.13
  • Published : 2017.04.30
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Abstract

This study was carried out to investigate the quality characteristics and antioxidative activity of bread containing lotus leaf powder (in ratios of 0, 1, 2, and 3% of the total flour). The pH of dough and bread were decreased as the concentration of lotus leaf powder increased. The volume of dough during fermentation did not show significant difference between 1% lotus leaf powder containing dough and control. The weight of bread increased by addition of lotus leaf powder. The volume, specific volume and baking loss rate of the bread decreased as lotus leaf powder levels increased. Redness and yellowness of the inner crumb were decreased by the addition of lotus leaf powder, but lightness was increased. 2,2-diphenyl-1-picrylhydrazyl-radical scavenging activity and total polyphenol contents were increased significantly as the concentration of lotus leaf powder increased. The overall acceptability of bread containing 1% lotus leaf powder showed no significant difference compared with control. The result exhibited that adding the lotus leaf powder into the bread increased antioxidant activity, and the highest quality improvement was obtained by incorporating 1% (w/w) lotus leaf powder into the bread formula.

기능성 제빵 소재로써 연잎의 이용 가능성을 검토하기 위해 연잎 분말을 1, 2 및 3%를 첨가하여 식빵을 제조하면서 제빵 특성 및 빵의 품질특성을 조사하였다. 연잎 분말의 조회분, 조지방 및 조단백질 함량은 각각 10.68, 3.40 및 22.31%로 나타났으며, 연잎 분말 95% 에탄올 추출물 1%(w/v) 농도에서 총 폴리페놀 함량은 $270.85{\mu}g/mL$였으며, 0.1%(w/v) 농도에서 DPPH 라디칼 소거능은 90.1%를 나타내었다. 연잎 분말을 첨가한 식빵 반죽과 식빵의 pH는 연잎 분말 첨가량이 증가할수록 감소하였으며, 산도는 증가하였다. 반죽의 부패 팽창도는 LLP-1과 대조구는 유의적인 차이는 나타나지 않았다(p<0.05). 연잎 분말 첨가 식빵의 굽기 손실률은 대조구에 비해 낮았으며, 식빵의 무게는 연잎 분말 첨가량이 증가할수록 증가하였고, 부피는 감소하였다. 식빵의 경도는 대조구가 가장 낮았으며 연잎 분말 첨가량이 증가할수록 경도도 높았다. 연잎 분말 첨가 식빵의 DPPH 라디칼 소거능과 총 폴리페놀 함량은 각각 17.08-40.13%와 $615.01-885.13{\mu}g/mL$의 범위를 나타내어 대조구에 (9.26% 및 $472.20{\mu}g/mL$)에 비해 높았으며, 연잎 분말 첨가량이 증가할수록 식빵의 DPPH 라디칼 소거능 및 총 폴리페놀 함량도 유의적으로 증가하였다(p<0.05). 연잎 분말을 첨가한 식빵의 종합적 기호도는 대조구가 3.64로 가장 높았으며, 다음은 LLP-1(3.56)으로 나타났으나, 두 시료간의 유의적인 차이는 나타나지 않았다(p<0.05). 식빵의 기능적 특성과 관능적 특성을 고려하였을 때, 연잎 분말은 1% 첨가하였을 때가 가장 적당하다고 판단되며, 최대 2%를 넘지 않은 것이 바람직할 것으로 사료된다.

Keywords

References

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