Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effects of Various Salt Concentrations on Physicochermical Properties of Brined Cucumbers for Pickle Process

피클제조를 위한 취청오이의 염농도에 따른 염장중 이화학적 특성

  • Published : 2003.06.01
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Abstract

Changes of physicochemical properties of brined cucumber were investigated in the samples mixed cucumber and water at 1 : 1.2 ratio in various salt concentrations from 15 to 30%. As salt concentrations in brine solutions were increased, cucumber was getting constricted and decreased in the size of diameter. Salt concentrations of brined cucumber were reached an equilibrium after 30 days of brine storage. When cucumber was preserved at 30% salt concentration, pH was gradually decreased until 60 days of brine storage. When cucumber was preserved in 15% salt solution, the yellowness on the surface of cucumber peels was the most intense among the groups. Among the groups preserved by more than 20% of salt, no difference was observed in intensity of yellowness after 30 days of brine storage. The absorbances of isopropyl alcohol extracts at 410, 505, 607, and 665 nm were different from those of raw cucumbers. Regardless of salt concentration, the hardness of cucumber was increased as preservation was prolonged except the group preserved in 15% salt solution.

각기 다른 염농도에서 염장한 오이의 이화학적 특성을 조사하였다. 염장시 첨가되는 염농도가 높을수록 수축현상이 심하였으며, 오이의 염농도는 염장 30일경에 30% 처리구를 제외한 모든 처리구에서 이론치와 유사한 농도를 나타내었다. pH의 경우 25%처리구는 염장 120일까지 감소 경향을 보인 반면 30%처리구는 60일이후부터 거의 변화가 없었다. 오이 표면의 녹색도는 염장 10일까지는 모든 처리구에서 녹색(-1.33~-2.87)이 유지되었으나 염장기간이 경과함에 따라 적색으로 변하였고, 이러한 현상은 염농도가 낮을수록 심하였다. 황색도는 염농도가 낮은 15% 첨가구가 염장 전기간에 걸쳐 가장 높은 황색도(6.15~12.52)를 보였다. Isopropyl alcohol 추출색소액 중 생오이의 색소추출액은 439, 473, 632 nm에서 피크를 나타낸 반면 염장오이는 염장초기 첨가된 염농도에 관계없이 생오이 색소추출액과는 다른 흡광도 변화를 나타내어 410, 505, 538, 607, 565 nm에서 새로운 피크를 형성하였다. 경도는 염농도에 관계없이 저장기간이 경과함에 따라 지속적으로 상승하였다.

Keywords

References

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