한국응용과학기술학회지 (Journal of the Korean Applied Science and Technology)

  • 제26권1호
  • /
  • Pages.10-17
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  • 2009
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  • 1225-9098(pISSN)
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  • 2288-1069(eISSN)
한국응용과학기술학회 (The Korean Society of Applied Science and Technology)
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Influence of the Kilning Conditions on Enzymatic Activity of Rice (Oryza sativa) Malt

  • Nguyen, Thach Minh (Faculty of Food and Biotechnology, Ho Chi Minh City University of Industry) ;
  • Nguyen, Xich Lien (Hochiminh City University of Technology) ;
  • Hoang, Kim Anh (Institute of Tropical Biology, Vietnamese Academy of Science and Technology) ;
  • Lee, Soo (Department of Chemical Engineering, Changwon National University)
  • 발행 : 2009.03.30
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초록

This study investigated the effect of kilning condfition on the diastatic power and activities of protease, $\alpha$-amylase, and $\beta$-amylase in rice malt. Common rice (Oryza sativa) was steeped at $30^{\circ}C$ for 50 h, germinated at $30^{\circ}C$ for 7 days, and kilned at $50^{\circ}C$ for 24 h. The moisture content and enzymatic activities were determined under various kilning times. As a result, the moisture content was reduced from 42.1 % to 3.9% after 24 h of kilning at $50^{\circ}C$. The protease activity of rice malt showed lower value than that of barley malt. All enzymatic activities were decreased during the kilning stage. Results indicated that after prolonged kilning at $50^{\circ}C$, the inactivation of hydrolytic enzymes might be occurred. Even though the amylolytic activity of malted rice showed low value, the rice malt shows the potential characteristics as ingredient for the brewing and cereal industries.

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