Quality Characteristics of Kimchi with Added Purified Licorice(Glycyrrhiza uralensis) Extract

감초정제물 첨가 김치의 품질특성

  • Lee, Su-Hyun (Department of Foods and Nutrition, Duksung Women's University) ;
  • Ko, Young-Tae (Department of Foods and Nutrition, Duksung Women's University)
  • 이수현 (덕성여자대학교 식품영양학과) ;
  • 고영태 (덕성여자대학교 식품영양학과)
  • Published : 2006.10.31

Abstract

The effects of purified licorice (Glycyrrhiza uralensis) extract (PLE) as a sugar substitute on kimchi quality were evaluated by investigating acid formation, growth of lactic acid bacteria, sensory properties, and volatile odor components of PLE-added kimchi. The pH of kimchi with higher amounts of added PLE increased slightly with two or three days ripening. The acidity of unripened kimchi or kimchi ripened for one day significantly increased with addition of PLE, while that of kimchi ripened for two or three days decreased significantly (p<0.05). Addition of PLE had no significant effect on the lactic acid bacteria count of kimchi compared to that of sugar. Overall acceptability and taste of 0.005 or 0.01% PLE-added kimchi ripened for two to three days were higher than those of other samples, whereas addition of more than 0.01% PLE to kimchi unripened or ripened for one day resulted in lower overall acceptability and taste than the reference sample. Diallyl sulfide and methyl trisulfide were newly produced by ripening of kimchi, and the amounts of some volatile odor components in kimchi were also changed during ripening.

본 연구의 목적은 김치의 맛을 증진시키기 위하여 감미료로 첨가되는 설탕 대신에 감초정제물을 첨가하여 김치의 품질특성을 개선하고자 하는 것이다. 김치제조원료에 설탕 또는 감초정제물을 첨가하여 젖산균의 생육과 산생성, 관능적 특성 및 휘발성냄새성분에 미치는 영향을 조사하였다. pH는 숙성 2일과 3일의 경우 감초정제물의 첨가농도가 증가함에 따라 다소 상승하는 경향을 보였다. 산도는 0일과 1일의 경우는 감초정제물의 첨가농도가 증가함에 따라 유의적으로 증가하였으나(p<0.05), 2일과 3일의 경우는 감초정제물의 첨가농도가 증가함에 따라 유의적으로 감소하였다(p<0.05). 감초정제물의 첨가로 젖산균수는 변화가 없었다. 비숙성시료와 1일숙성시료의 전반적인 기호도와 맛은 감초정제물의 첨가농도가 0.01% 이상인 경우 유의적으로 저하하였다(p<0.05). 2${\sim}$3일 숙성시료의 전반적인 기호도와 맛은 감초정제물 0.005% 또는 0.01% 첨가시료가 다른 시료보다 유의적으로 우수하였다(p<0.05). 비숙성시료에 비하여 숙성시료에서 diallyl sulfide와 methyl trisulfide가 새로이 생성되었으며, 일부의 냄새성분 함량은 숙성과정에서 증가하거나 변화를 보였다.

Keywords

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