Journal of Applied Biological Chemistry

  • Volume 66
  • /
  • Pages.289-298
  • /
  • 2023
  • /
  • 1976-0442(pISSN)
  • /
  • 2234-7941(eISSN)
The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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A study on the deterioration phenomenon of stored rice during the decomposition process of polysaccharide carbohydrates

다당류 탄수화물의 분해과정을 통한 보관 벼의 감모현상에 관한 연구

  • Yong-Sik Youn (Experiment Research Institute, National Agriculture Products Quality Management Service) ;
  • Jae-Min An (Experiment Research Institute, National Agriculture Products Quality Management Service) ;
  • Wang-Taek Hwang (Experiment Research Institute, National Agriculture Products Quality Management Service) ;
  • Hyungmin Roh (Department of Chemical and Biological Engineering, Inha Technical College) ;
  • Hae-Min Park (Department of Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Kyeongseok Oh (Department of Chemical and Biological Engineering, Inha Technical College)
  • Received : 2023.06.02
  • Accepted : 2023.07.02
  • Published : 2023.12.31
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Abstract

Stored rice grain undergoes physical and chemical deteriorations over time. As temperature and moisture content are important factors affecting to the denaturation of rice, it is important to store rice at a low temperature and hermetic condition. From a microscopic point of view, many studies have already reported how proteins and lipids were denatured within rice grain. Meanwhile, the weight loss of rice is currently observed at actual storage sites and can occur for diverse reasons. In this study, it was assumed that the decomposition process of polysaccharides, known as the main component of rice, plays an important role in its weight loss. In specific, the roles of enzymes were also evaluated. Our interest is in the major polysaccharides within a rice grain such as starch as well as within a rice endosperm cell wall. It is suspected that the weight loss of rice grains during storage seems to associate with the degradation of amylose and amylopectin. Nevertheless, it should be also speculated the correlating effect of other components such as proteins and lipids.

보관된 벼는 시간이 지남에 따라 물리화학적인 변성이 일어난다. 쌀알의 변성에 영향을 주는 중요한 요인으로 온도와 함수율을 들 수 있다. 가급적 저온보관과 밀폐보관이 중요하다. 미시적인 관점에서, 쌀에 함유된 단백질과 지질의 변성은 이미 많은 연구들이 보고되었다. 한편, 실제 보관 현장에서 확인되는 벼의 중량 감소, 즉 감모현상은 현재 진행형이며 다양한 원인으로 발생될 수 있다. 본 논문에서는, 쌀의 주성분인 탄수화물의 분해과정이 감모현상에 중요한 역할을 한다고 가정하였으며, 효소에 의한 탄수화물 분해과정들을 살펴보았다. 관심의 대상이 되는 주요 탄수화물로는 전분과 세포벽에 포함된 탄수화물이 있다. 쌀의 보관 과정 중 중량 감소는 주로 전분의 주성분인 아밀로스와 아밀로펙틴의 분해가 원인일 것으로 보이지만, 단백질과 지질을 포함한 다른 성분들의 변성 또한 종합적으로 영향을 주고 있다고 유추된다.

Keywords

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