원문정보
Microflora and Color of Soybean Paste Sterilized by Counterflow Hat Exchanger
초록
영어
To develop a large scale countercurrent single pass heat exchanger for continuous transportation and sterilization of soybean paste, microflora and color value of sterilized soybean paste were examined at various sterile condition. Aerobes, anaerobes, molds, yeasts and lactic acid bacteria were 5.1 x 107 CFU/g, 7.1 x 107 CFU/g, 2.6 x 105 CFU/g, 4.3 x 106 CFU/g, 1.3 x 107 CFU/g, respectively in raw soybean paste. In gold band ampoule test, aerobes and anaerobes of soybean paste were viable up to 90℃, but become unviable at 100℃. Molds decreased rapidly and yeasts decreased slowly from 70℃. Lactic acid bacteria were unviable at 60℃ within 10 min. In color test, Hunter L, a, and b values of soybean paste were 50.2, +5.6, and +17.8, respectively. After heating in polyethylene film bag at 80℃, Hunter values were not so much changed and become 50.2, +4.7, and +19.7, respectively. The micorflora and color of soybean paste sterilized in a large scale heat exchanger system resulted in very similar to those of gold band ampoule and polyethylene film bag by effective heat transfer.
목차
재료 및 방법
된장의 제조
생균수 측정방법
된장균의 멸균 및 D value 측정
내열성 미생물의 분리 및 동정
열교환기에 의한 된장의 연속 멸균
색도측정
결과 및 고찰
시료된장의 미생물 분포
살균된장의 미생물균 변화
내열성균의 동정 및 D value의 측정
열교환기에 의한 된장의 연속 멸균
색도측정
요약
감사
참고문헌