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해양 암반 심층수를 응고제로 한 두부의 품질특성

Quality characteristics of tofu coagulated by deep ground sea-like water

  • 투고 : 2013.03.27
  • 심사 : 2013.09.24
  • 발행 : 2013.10.30

초록

해양 암반 심층수의 두부 응고제로서 활용 가능성을 확인하기 위하여 시판 두부 응고제 3종($MgCl_2$, $CaSO_4$ 및 glucono-${\delta}$-lactone)으로 제조한 두부와 농축하여 8 $^{\circ}Brix$로 농도 조절한 해양 암반 심층수를 두유 L당 20, 25 및 30g씩(SW-20, 25, 30) 첨가하여 제조한 두부의 품질특성을 분석하였다. 두부의 제조 수율은 SW-30에서 유의적으로 높았으며, 순물의 탁도는 해양 암반 심층수를 응고제로 사용한 실험군에서 유의적으로 높았다. 두부의 수분은 72.72~74.86%, pH는 6.09~7.01이었는데, glucono-${\delta}$-lactone을 응고제로 사용한 두부에서 유의적으로 낮았으며, 여타 시료간에는 유의차가 없었다. 두부의 무기물 함량은 응고제에 함유되어 있는 무기물의 영향을 많이 받아 응고제의 주요 무기물이 두부에서도 다량 검출되었으나, 25 mg/kg 미만의 미량 무기질은 응고제의 영향이 적었다. 두부의 명도와 황색도는 해양 암반 심층수로 응고한 실험군간에는 유의차가 없었다. 두부의 물성 중 경도는 시판 응고제를 사용한 두부에 비해 해양 암반 심층수를 사용한 두부에서 유의적으로 낮았다. 관능평가 결과 두부의 응고제는 질감과 맛에 영향을 미쳤는데, 경도가 낮거나 높을 경우 질감에 대한 기호도도 감소하였으며, 응고제로부터 유래한 쓴맛이나 신맛도 관능적 특성을 크게 저해하였다. 이상의 결과를 종합하여 볼 때 해양 암반 심층수는 두부의 이화학적 특성에 있어 시판 응고제로 제조한 두부와 유사한 특성을 나타내었으며, 관능적 특성은 오히려 우수하여 두부 응고제로 활용 가능성이 충분하였다.

Quality and sensory characteristics of tofu prepared with concentrated to 8 $^{\circ}Brix$ deep ground sea-like water (SW) were investigated to check the availability for coagulants. The tofu was coagulated with three kinds of commercially coagulant, such as $MgCl_2$, $CaSO_4$ and glucono-${\delta}$-lactone. Different amounts of SW and soybean milk were added: SW-20 g/L, SW-25 g/L and SW-30 g/L. The moisture content and pH were significantly lower in which preparation with glucono-${\delta}$-lactone coagulated tofu, and others has not significantly difference each other. The mineral contents in the coagulant influenced the mineral content of the tofu, which contained larger quantities of major minerals. However, the mineral content of the tofu was not affected of the mineral concentration in the coagulant. The L and b values of the tofu prepared with SW were not significantly different. The hardness of the tofu prepared with the commercial coagulants was significantly lower than that of the tofu produced with the SW. The sensory property was lower when the hardness was lower and higher. In conclusion, the quality characteristics of SW-prepared tofu were not significantly different from those of the tofu prepared with the commercial coagulants, but the texture and the taste of the SW-prepared tofu were excellent.

키워드

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  1. Quality characteristics and antioxidant activity of tofu made from lipoxygenase-free genotypes vol.21, pp.2, 2014, https://doi.org/10.11002/kjfp.2014.21.2.215
  2. Quality Characteristics of Tofu with Added Cowpea (Vigna unguiculata) Meal vol.29, pp.4, 2014, https://doi.org/10.13103/JFHS.2014.29.4.363
  3. Effects of crab shell extract as a coagulant on the textural and sensorial properties of tofu (soybean curd) vol.7, pp.2, 2019, https://doi.org/10.1002/fsn3.837