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Changes in Contents of Nutritional Components and Eating Quality of Brown Rice by Pericarp Milling

과피층 제거에 따른 현미의 이화학특성 및 현미밥의 식감변화

  • Kim, Hye-Won (Rice Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Oh, Sea-Kwan (Rice Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Dae-Jung (Rice Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Yoon, Mi-Ra (Rice Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Jeong-Heui (Rice Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Choi, Im-Soo (Rice Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Yeon-Gyu (Rice Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Cha, Kil-Nam (Rice Born co. Ltd.)
  • 김혜원 (농촌진흥청 국립식량과학원 답작과) ;
  • 오세관 (농촌진흥청 국립식량과학원 답작과) ;
  • 김대중 (농촌진흥청 국립식량과학원 답작과) ;
  • 윤미라 (농촌진흥청 국립식량과학원 답작과) ;
  • 이정희 (농촌진흥청 국립식량과학원 답작과) ;
  • 최임수 (농촌진흥청 국립식량과학원 답작과) ;
  • 김연규 (농촌진흥청 국립식량과학원 답작과) ;
  • 차길남 ((주)라이스본)
  • Received : 2011.12.21
  • Accepted : 2012.03.13
  • Published : 2012.03.30

Abstract

In this study, the effect of degree of milled wax layer on compositions (protein and total dietary fiber content), Alkali Digestion Value (ADV), and texture (hardness, stickiness, toughness, and adhesiveness) with brown rice was investigated. For all the rice cultivars, $Baegjinju$, $Keunnun$, $Samkwang$, and $Seolgaeng$, protein content decreased significantly as the degree of pericarp milling increased ($p$<0.05). Total dietary fiber (TDF) content for $Keunnun$ (9.56%${\rightarrow}$8.09%) and $Samkwang$ (8.05%${\rightarrow}$7.06%) significantly decreased with the degree of removed wax layer. ADV was not affected by being removed wax layer, but ADV of $Samkwang$ was increased from 3.56 to 6.78. As the degree of removed wax layer increased (0%${\rightarrow}$10%), hardness and toughness of cooked brown rice were decreased but stickiness and adhesiveness was increased. The ratio of adhesiveness to hardness was increased with decreased wax layer of brown rice. Accordingly, It suggests that the regulation of the wax layer with brown rice was effected texture of cooked brown rice. The milling technology in wax layer of brown rice is that might be thought to be very useful in rice processing industry.

본 연구는 현미의 새로운 가공법 개발을 위하여 현미의 과피층을 0%, 5%, 및 10%를 도정하여 이에 따른 현미의 단백질 및 총 식이섬유 함량변화를 조사하였다. 그리고 쌀의 품질 특성 조사를 위하여 과피층 제거 정도 따른 알칼리붕괴도(ADV)를 조사하고 현미밥의 경도, 끈기, 인성 및 부착성을 측정하였다. 그 결과, 설갱벼를 제외하고 과피층이 감소할수록 현미의 단백질 및 총 식이섬유 함량이 감소하는 경향을 나타내었다. ADV는 삼광벼가 과피층 제거에 의하여 유의적으로 증가하는 경향을 나타내어 과피층 제거에 의하여 호화가 용이해질 것으로 판단된다. 또한 현미밥의 기계적 식미치를 측정한 결과, 백진주벼 및 큰눈벼의 경도 및 인성은 감소하였고, 백진주벼, 큰눈벼, 설갱벼의 끈기 및 부착성은 증가하였다. 그리고, 과피층 제거에 의하여 백진주벼<삼광벼<큰눈벼 순서로 부착성-경도 비율이 증가하는 결과를 보였다. 따라서 밥맛이 따라서 과피층의 부분적인 도정이 현미의 품질 및 식감을 향상시킬 것으로 기대된다.

Keywords

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