Effect of Sea Tangle on Fermentation and Quality Characteristics of Cheongbukjang

다시마의 첨가가 청국장 발효와 품질특성에 미치는 영향

  • Jung Yoo-Kyung (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Lee Ye-Kyung (Department of Food Science and Technology, Catholic University of Daegu) ;
  • No Hong-Kyoon (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Kim Soon-Dong (Department of Food Science and Technology, Catholic University of Daegu)
  • 정유경 (대구가톨릭대학교 식품외식산업학부 식품공학) ;
  • 이예경 (대구가톨릭대학교 식품외식산업학부 식품공학) ;
  • 노홍균 (대구가톨릭대학교 식품외식산업학부 식품공학) ;
  • 김순동 (대구가톨릭대학교 식품외식산업학부 식품공학)
  • Published : 2006.02.01

Abstract

Quality characteristics of Cheongbukjangs with $1\~3\%$ desalted and dried sea tangle powder were investigated after fermentation for 48 hr at $40^{\circ}C$. Addition of sea tangle, irrespective of concentration, did not affect pH and slime content of Cheongbukjang. Color L* and a* values were generally decreased with increasing sea tangle concentration. There were no significant differences in total microbe, amino nitrogen content, and protease and amylase activity between control and Cheongbukjangs with up to $2\%$ sea tangle. However, addition of $3\%$ sea tangle resulted in decreased total microbe, amino nitrogen content, and enzyme activity compared with those of control. Fiber content increased with increasing sea tangle concentration and hardness increased by 1.5 times at $2\%$ sea tangle and by 2.6 times at $3\%$ sea tangle compared with that of control. Results for sensory evaluation revealed that addition of $2\%$ sea tangle was the optimum concentration in view of reducing bitter taste and odor, and improving overall acceptability.

탈염, 건조한 다시마 분말을 삶은 콩에 대하여 $1\~3\%$ 첨가하여 발효시킨 전통청국장의 품질특성을 조사하였다. pH는 대조구와 첨가구간의 유의차가 없었다. L*값과 a*값은 다시마의 첨가량이 증가할수록 낮아졌으며, b*값은 첨가구가 대조구보다 낮았으나 첨가구간의 차이는 보이지 않았다. 총균수는 다시마 분말을 $2\%$까지 첨가하였을 때는 대조구와 유의적인 차이를 보이지 않았으나 $3\%$ 첨가구에서는 대조구보다 낮았다. 다시마의 첨가량이 증가함에 따라 단백질함량은 감소하였으나 탄수화물과 회분함량은 증가하였다. 아미노태 질소의 함량은 $1,\;2\%$ 첨가구에서는 대조구와 유의적인 차이를 보이지 않았으나 $3\%$ 첨가구에서는 대조구보다 감소하였다. 점질물 함량은 대조구와 다시마 첨가구간에 유의성은 없었다. 식이섬유의 함량은 $1\%$ 첨가구에서는 대조구보다 $28.9\%,\;2\%$ 첨가구에서는 $57.2\%,\;3\%$ 첨가구에서는 $85.0\%$가 증가하였다. Pretense와 amylase의 활성은 다시마를 $1,2\%$ 첨가구에서는 대조구와 유의차가 없었으나 $3\%$ 첨가구는 대조구에 비하여 각각 $21.5\%$$26.8\%$가 감소하였다 경도(hardness)는 다시마 $1\%$ 첨가구에서는 대조구와 유의차를 보이지 않았으나 $2\%$ 첨가구는 대조구의 1.5배, $3\%$ 첨가구는 2.6배가 높았다. 다시마의 첨가비율이 높아짐에 따라 응집성(cohesiveness)과 탄력성(springiness)은 감소하였으나 씹힘성(chewiness)과 깨짐성(brittleness)은 높아지는 경향을 보였고 쓴맛과 청국장 냄새가 감소되는 반면 종합적 기호도가 향상되었다.

Keywords

References

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