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Fermentation Characteristics of Chungkookjang Prepared Using Different Soybean

콩 종류에 따른 청국장의 발효특성

Lee, Na-Ri;Lee, Sang-Mee;Go, Tae-Hun;Jeong, Seong-Yun;Hong, Chang-Oh;Kim, Keun-Ki;Park, Hyean-Cheal;Lee, Sang-Mong;Kim, Young-Gyun;Son, Hong-Joo
이나리;이상미;고태훈;정성윤;홍창오;김근기;박현철;이상몽;김용균;손홍주

  • Received : 2012.12.14
  • Accepted : 2013.03.14
  • Published : 2013.06.28

Abstract

This study was carried out to investigate changes of protease and amylase activities and nitrogen content in Chungkookjang prepared by Bacillus subtilis S8 and different soybean. Amino-type nitrogen and ammonia-type nitrogen contents increased with an increase in fermentation time and was the highest in black soybean Chungkookjang. The number of viable cells increased up to 24 h of fermentation at all temperatures tested; especially, their levels were the highest at $40^{\circ}C$. Protease activity was the highest in black soybean Chungkookjang. ${\alpha}$-amylase activity increased significantly up to 6 h of fermentation at $30^{\circ}C$ and $40^{\circ}C$ and then maintained constantly. It also increased up to 30-36 h of fermentation at $45^{\circ}C$ and then decreased. ${\beta}$-amylase activity was the highest in black soybean Chungkookjang at $35^{\circ}C$ and $40^{\circ}C$ and in yellow soybean Chungkookjang at $45^{\circ}C$. Production pattern of reducing sugar was similar to that of ${\beta}$-amylase. Amino-type nitrogen, viable cell number and reducing sugar content and ${\beta}$-amylase activity was the highest in Chungkookjang fermented at $40^{\circ}C$. Considering amino-type and ammonia-type nitrogen contents, Chungkookjang fermentation using yellow soybean was favorable. However, the fermentation using black soybean was favorable, considering protease and amylase activities and reducing sugar content.

Keywords

Bacillus subtilis;Chungkookjang;Fermentation;Soybean cultivar

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Cited by

  1. Manufacturing and Quality Characteristics of the Cheonggukjang Fermented Using Starter Derived from Rice Straw Removed Bacillus cereus Selectively vol.30, pp.1, 2015, https://doi.org/10.13103/JFHS.2015.30.1.65
  2. Quality Characteristics of Various Bean Varieties Fermented with Bacillus subtilis vol.32, pp.5, 2016, https://doi.org/10.9724/kfcs.2016.32.5.541

Acknowledgement

Supported by : 부산대학교