Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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The Quality Characteristics of Low Raffinose and Stachyose (LRS) Soybean Cultivars and their Tofu

Raffinose와 stachyose 함량이 낮은 콩과 두부의 품질특성

  • Lee, Soo-Jung (Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Hu, Wen-Si (Department of Food Science and Nutrition, Gyeongsang National University) ;
  • Chung, Jong-Il (Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Jeong, Bo-Young (Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Sung, Nak-Ju (Department of Food Science and Nutrition, Gyeongsang National University)
  • 이수정 (경상대학교 농업생명과학연구원) ;
  • 호문사 (경상대학교 식품영양학과) ;
  • 정종일 (경상대학교 농업생명과학연구원) ;
  • 정보영 (경상대학교 농업생명과학연구원) ;
  • 성낙주 (경상대학교 식품영양학과)
  • Received : 2017.08.22
  • Accepted : 2017.10.10
  • Published : 2017.11.30
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Abstract

The quality characteristics of three non-genetically modified (GM) LRS soybean cultivars free of LOX 1, 2 and 3, such as Jinyang, Hayoung and Daebok, were compared to the characteristics of Taekwang, a soybean with LOX 1, 2 and 3 and general contents of raffinose and stachyose. Taekwang was used as a control soybean. The weights of 100 for Taekwang and Hayoung soybeans were significantly higher than those of the other samples. The crude-protein contents of the Jinyang and Hayoung soybeans were significantly higher than the crude-protein content of the Taekwang soybeans. Similar tofu yields were observed in the Taekwang, Hayoung and Daebok soybeans. The highest tofu yield was observed in the Hayoung soybeans. The isoflavone contents of the soybeans and tofu were 1.4-1.6 times and 1.8-3.4 times higher than the contents of the control soybeans, respectively. The total phenol contents of the Hayoung and Daebok soybeans were significantly higher than the contents of the control soybeans. Additionally, the total phenol and flavonoid contents were significantly higher in the tofu made from the LRS cultivars than in the tofu made from the control cultivar. The antioxidant activities of the Taekwang soybeans were higher than the antioxidant activities of the LRS-cultivar soybeans. However, the antioxidant activities of tofu made from the LRS cultivars were significantly higher than the antioxidant activities of tofu made from the control cultivar. The results suggested that the soybeans of the LRS cultivars were suitable for tofu products. The Hayoung cultivar may be the most suitable due to its higher crude protein and isoflavone contents and its significant antioxidant activity.

LOX-1,2,3 결핍과 비소화성 당류인 raffinose와 stachyose 함량이 낮은 품종(LRS)인 진양콩, 하영콩 및 대복콩을 원료로 하여 제조한 두부의 품질특성을 태광콩 두부와 비교하였다. 태광콩과 하영콩의 백립중은 여타 시료에 비해 유의적으로 높았다. 조단백질 함량은 태광콩에 비해 진양콩 및 하영콩에서 유의적으로 많았다. 두부의 수율은 태광콩, 하영콩 및 대복콩으로 만든 두부가 비슷한 수준이었다. 두부의 경도는 태광콩 및 대복콩으로 만든 두부가 가장 낮았으며, 하영콩으로 만든 두부에서 유의적으로 높았다. 콩 및 두부의 이소플라본 함량은 대조구에 비해 LRS 콩은 약 1.4~1.6배, 두부는 약 1.8~3.4배 높은 함량이었다. 콩의 총 페놀 함량은 대조구에 비해 하영콩 및 대복콩에서 유의적으로 높았다. 두부의 총 페놀 및 플라보노이드 함량은 대조구에 비해 하영콩 및 대복콩으로 만든 두부에서 유의적으로 높았다. 콩의 항산화 활성은 태광콩이 LRS 콩에 비해 높은 활성이었으나, 두부에서는 하영콩 및 대복콩으모 만든 두부가 대조구에 비해 유의적으로 높았다. 따라서 LRS 콩은 두부 제조에 적합하나 특히 하영콩이 콩의 단백질, 이소플라본 함량 및 두부의 항산화 활성 측면에서 가장 우수한 것으로 판단된다.

Keywords

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