Effects of Germination in Brown Rice by Addition Chitosan/Glutamic acid

Chitosan/Glutamic acid 처리가 현미의 발아에 미치는 영향

  • Jung Gyu-Ho (Department of Food Science and Technology, Keimyung University) ;
  • Park Nan-Young (Keimyung Foodex Co. Ltd.) ;
  • Jang Sang-Moon (Department of Hotel Cooking and Beverage, Daegu Health College) ;
  • Lee Joo-Baek (Department of Hotel Cooking and Beverage, Daegu Health College) ;
  • Jeong Yong-Jin (Department of Food Science and Technology, Keimyung University)
  • 정규호 (계명대학교 식품가공학과) ;
  • 박난영 ((주)계명푸덱스) ;
  • 장상문 (대구보건대학 호텔조리음료계열) ;
  • 이주백 (대구보건대학 호텔조리음료계열) ;
  • 정용진 (계명대학교 식품가공학과)
  • Published : 2004.12.01

Abstract

To improve the levels of ${\gamma}$-aminobutyric acid (GABA) in germinated brown rice, chitosan and glutamic acid were treated during the brown rice germination. The GABA contents in germinated brown rices were 425.7 nmole/g and 637.0 nmole/g at germination temperature of $25^{\circ}C$ and germination time of 72 hrs. Response surface methodology(RSM) was used to monitor characteristics of germination from brown rices. As glutamic acid and chitosan concentration were increased, the GABA content was also increased. The ranges of optimum conditions were $105{\sim}160\;ppm$ in chitosan concentration and $200{\sim}290\;ppm$ in glutamic acid concentration. Predicted values at the optimized conditions were acceptable in comparison with experimental values.

현미(brown rice)를 이용하여 기능성 성분인 GABA의 고함량 발아조건을 효과적으로 활용한 최적조건을 설정하고자 조단백 함량과 GABA 함량을 분석하였다. 발아온도 $25^{\circ}C$에서 조단백 함량과 GABA 함량은 $260.9\;mg\%$와 425.7 nmole/g으로 나타났으며 발아시간 72시간에서 조단백 함량과 GABA 함량이 $230.6\;mg\%$와 637.0 nmole/g으로 나타났다. chitosan과 glutamic acid 100 ppm을 혼합한 처리구에서 발아시킨 현미의 조단백 함량이 가장 낮게 나타나 이를 토대로 중심합성계획에 의해 발아현미 최적 생성조건을 예측하였다. 발아현미의 조단백 함량에 대한 반응표면은 안장점의 형태로 glutamic acid가 더 큰 영향을 미치며, GABA 함량에 대한 반응표면은 최대점의 형태로 나타났다. 발아현미의 최적 생성조건은 chitosan $105{\sim}160\;ppm$이며 glutamic acid 함량은 $200{\sim}290\;ppm$의 범위로 나타났으며 예측된 범위에서 실험한 결과 예측치 보다 조금 높게 나타났다.

Keywords

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