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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Quality Characteristics of Yakju as Affected by Rice Nuruk with Different Degrees of Milling

도정도별 쌀누룩 약주의 품질특성

  • Choi, Jeong Sil (Fermented Food Science Division, National Institute of Agricultural Sciences, RDA) ;
  • Yeo, Soo Hwan (Fermented Food Science Division, National Institute of Agricultural Sciences, RDA) ;
  • Jeong, Seok Tae (Fermented Food Science Division, National Institute of Agricultural Sciences, RDA)
  • 최정실 (국립농업과학원 발효식품과) ;
  • 여수환 (국립농업과학원 발효식품과) ;
  • 정석태 (국립농업과학원 발효식품과)
  • Received : 2017.03.13
  • Accepted : 2017.06.07
  • Published : 2017.07.31
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Abstract

This study aimed to investigate the effect of rice nuruk prepared from rice with different degrees of milling (0, 10, 30, 50, and 70%) on physicochemical qualities of yakju. The results indicated significant differences in the qualities of yakju prepared using rice nuruk from rice with different degrees of milling. Specially, pH, amino acidity, brownness, b value, and color difference were significantly reduced as the degrees of milling increased, whereas contents of alcohol and volatile acid, reducing sugar, and L value were increased. Malic acid, succinic acid, and lactic acid were the main organic acids in yakju, and there were significant differences among the treatments in malic acid, lactic acid. However, there was no tendency according to different degrees of milling. In addition, contents of total free amino acids and nitrogen compounds showed no tendency according to degrees of milling, whereas the content of aspartic acid showed a tendency to decrease significantly. The content of 2-phenyl alcohol in the volatile flavor components showed a tendency to increase significantly with higher degree of milling of rice nuruk, whereas contents of n-propanol and iso-amyl alcohol tended to decrease significantly.

도정도를 달리한 쌀누룩이 약주의 품질에 미치는 영향을 살펴보기 위하여 오대쌀 일반미를 기준으로 도정하여 도정도별(0, 10, 30, 50, 70%) 쌀누룩을 제조하고 그 누룩으로 담근 약주의 품질 특성을 분석하였다. 도정도별 쌀누룩에 따른 약주의 품질은 처리구 간에 모두 유의적인 차이를 나타내었다. 특히 약주의 제조 시에 도정도가 큰 누룩을 사용할수록 약주의 pH, 아미노산도, 갈색도, b값 및 색차 ΔE는 유의적으로 감소하는 경향을 보인 반면에 알코올과 휘발산 함량, 환원당 및 L값은 유의적으로 증가하는 경향을 나타내었다. 유기산의 경우 사과산, 호박산, 젖산이 주를 이루고 처리구 간에 유의적인 차이를 나타내었지만 도정도에 따른 경향성은 보이지 않았다. 또한, 전체적인 유리아미노산 및 유리질소화합물 함량도 도정도에 따른 경향성은 보이지 않았지만 아스파르트산은 도정도가 증가할수록 유의적으로 감소하는 경향을 보였다. 휘발성 향기성분 중 2-페닐 알코올 함량은 도정도가 큰 누룩을 사용한 약주에서 유의적으로 증가하는 경향을 나타낸 반면에 n-프로판올과 이소 아밀 알코올 함량은 도정도가 클수록 유의적으로 감소하는 경향을 나타내었다.

Keywords

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