Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Physicochemical and sensory quality characteristics of various rice Jochung products

각종 쌀 조청의 이화학적 및 관능학적 품질 특성

  • Wee, Kyung Il (Department of Food Processing and Distribution, Gangneung-Wonju National University) ;
  • Kang, Yoon Han (Department of Food Processing and Distribution, Gangneung-Wonju National University) ;
  • Lee, Keun Taik (Department of Food Processing and Distribution, Gangneung-Wonju National University)
  • 위경일 (강릉원주대학교 식품가공유통학과) ;
  • 강윤한 (강릉원주대학교 식품가공유통학과) ;
  • 이근택 (강릉원주대학교 식품가공유통학과)
  • Received : 2016.07.05
  • Accepted : 2016.09.21
  • Published : 2016.11.30
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Abstract

This study aimed to compare the quality characteristics of developed rice Jochung (E) with those of commercial-rice Jochung (A, B, C, and D). The total soluble solid, reducing sugar, and dextrose equivalent of developed rice Jochung were $80^{\circ}Brix$, 44.53%, and 56.94%, respectively. The pH and titrable acidity were 6.25 and 0.19%, respectively. The color difference value (${\Delta}E$) of developed rice Jochung was 74.42, which was significantly lower than the other samples investigated. The light transmittance and total polyphenol contents of developed rice Jochung were 56.4%T and 108.23 mg GAE/100 g, respectively. The adhesiveness values of various commercial-rice Jochung products were 29.0~66.0 sec, while that of developed-rice Jochung was 61 sec, showing good textural properties for use in manufacturing Hangwa, a Korean traditional cookie. The electron-donating values of various rice Jochung were 20.4~50.3%, among which the developed-rice Jochung showed the highest value. The reducing powers of various rice Jochung products were 0.44~0.72, while that of the developed product was 0.72, which was significantly higher than the other values. Sensory evaluation revealed that the color scores of developed- and commercial-rice Jochung products were 6.70~6.80. Flavor scores of rice Jochung products ranged from 6.00 to 7.00. Taste and mouth feeling scores of developed-rice Jochung did not significantly differ from those of commercial Jochung products. Compared to commercial-rice Jochung products, developed-rice Jochung made with malt extract exhibited high polyphenols content. However, there were no significant differences in the overall acceptability scores between commercial-rice Jochung products and the developed product. The developed-rice Jochung analyzed in this study may be useful as a traditional sweetener for various Hangwa products as a substitute for corn syrup or Jochung.

본 연구는 4종의 시판품과 자체 개발하여 위탁 생산한 시제품 등 총 5종의 쌀 조청을 대상으로 품질 특성을 비교 조사하였다. 시제품의 총고형분, 환원당과 포도당 당량은 각각 $80^{\circ}Brix$, 44.53%와 56.94%로 나타났다. 그리고 시제품의 pH와 적정 산도는 각각 6.25와 0.19%이었으며, 색차는 74.42로 조사된 시료들 중 유의적으로 가장 낮은 값을 나타내었다. 한편 광투과도와 총 폴리페놀은 각각 56.4%T와 108.23 mg GAE/100 g인 것으로 확인되었다. 각종 쌀 조청의 물성 중 부착도는 29.0~66.0 sec 범위였는데 그 중 시제품은 61 sec로 한과 제조용으로 적당한 값을 나타내었다. 각종 쌀 조청의 DPPH 라디칼 소거능은 20.4~50.3% 범위였는데 그 중 시제품이 유의적으로 가장 높았다. 또한 각종 쌀 조청의 환원력은 0.44~0.72 범위였는데 그 중 시제품이 0.72로 가장 높았다. 쌀 조청 제품의 관능검사 결과 색은 6.70~6.80점, 향은 6.00~7.00점을 나타내었다. 맛과 입안촉감의 경우 시판품과 시제품 간에 유의적인 차이를 나타내지 않았다. 종합적 기호도의 경우 엿기름추출액을 첨가하여 제조한 시제품은 시판품에 비해 폴리페놀 함량이 높으나 유의적인 차이를 나타내지 않았다. 따라서 본 연구에서 개발된 쌀 조청 시제품은 한과 제품을 비롯하여 가공식품용으로 이용되기 적합한 것으로 확인되었다. 향후 전통식품인 쌀 조청의 소비 증대를 위해서 쌀 조청 제조기술을 활용한 향미를 개선하는 등 활용도 증진 연구가 더욱 필요할 것으로 사료된다.

Keywords

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