최근, 저온 장시간 발효된 묵은지에 대한 소비가 증가하고 있다. 본 논문에서는, 저온($5^{\circ}C$)에서 46주 동안 발효된 묵은지의 pH, 산도, 유기산, 생균수, 아미노산, polygalacturonase (PG) 활성 등을 분석하였다. 10주 발효한 김치에서는 pH 4.1, 산도 0.99%를 나타낸 반면, 46주 발효한 김치에서는 pH 3.9, 산도 1.29%를 보였다. 한편, 10주에서 46주로 발효 기간이 증가하면서, 젖산, 젖산/초산비, Lactobacillus species/Leuconostoc species비 등은 증가한 반면, 호기성 세균, 효모, Lactobacillus species, Leuconostoc species, 유리아미노산, PG 효소 활성은 감소하였다.
최근, 저온 장시간 발효된 묵은지에 대한 소비가 증가하고 있다. 본 논문에서는, 저온($5^{\circ}C$)에서 46주 동안 발효된 묵은지의 pH, 산도, 유기산, 생균수, 아미노산, polygalacturonase (PG) 활성 등을 분석하였다. 10주 발효한 김치에서는 pH 4.1, 산도 0.99%를 나타낸 반면, 46주 발효한 김치에서는 pH 3.9, 산도 1.29%를 보였다. 한편, 10주에서 46주로 발효 기간이 증가하면서, 젖산, 젖산/초산비, Lactobacillus species/Leuconostoc species비 등은 증가한 반면, 호기성 세균, 효모, Lactobacillus species, Leuconostoc species, 유리아미노산, PG 효소 활성은 감소하였다.
Recently, many Koreans have started to consume aged kimchi fermented long-term at low temperatures. In the present study, the effect of low temperature ($5^{\circ}C$) on pH, titratable acidity (TA), organic acid level, viable microbial cell count, amino acid concentration, and polygalactu...
Recently, many Koreans have started to consume aged kimchi fermented long-term at low temperatures. In the present study, the effect of low temperature ($5^{\circ}C$) on pH, titratable acidity (TA), organic acid level, viable microbial cell count, amino acid concentration, and polygalacturonase activity (PG) during long-term fermentation (46 weeks) of kimchi, were evaluated. After 10 weeks of fermentation, kimchi had a pH of 4.1 and a TA of 1.0%, respectively after 46 weeks fermentation, these values were 3.9 and 1.3%, respectively. Lactic acid, the ratio of lactic acid to acetic acid, and the ratio of Lactobacillus species/Leuconostoc species in kimchi increased as fermentation progressed from 10 weeks to 46 weeks. However, total viable cell counts of aerobic bacteria, yeasts, Lactobacillus species, and Leuconostoc species, free amino acid levels, and PG decreased as the fermentation period was extended from 10 weeks to 46 weeks.
Recently, many Koreans have started to consume aged kimchi fermented long-term at low temperatures. In the present study, the effect of low temperature ($5^{\circ}C$) on pH, titratable acidity (TA), organic acid level, viable microbial cell count, amino acid concentration, and polygalacturonase activity (PG) during long-term fermentation (46 weeks) of kimchi, were evaluated. After 10 weeks of fermentation, kimchi had a pH of 4.1 and a TA of 1.0%, respectively after 46 weeks fermentation, these values were 3.9 and 1.3%, respectively. Lactic acid, the ratio of lactic acid to acetic acid, and the ratio of Lactobacillus species/Leuconostoc species in kimchi increased as fermentation progressed from 10 weeks to 46 weeks. However, total viable cell counts of aerobic bacteria, yeasts, Lactobacillus species, and Leuconostoc species, free amino acid levels, and PG decreased as the fermentation period was extended from 10 weeks to 46 weeks.
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문제 정의
Although the use of kimchi refrigerators make possible for long-term storage of kimchi at low temperature, little information for aged-kimchi is available. The objective of this study was to investigate the effect of long-term fermentation at low temperature on qualities of aged-kimchi.
가설 설정
2)ND: not detected.
3)Numbers in parenthesis indicate sum of 18 amino acids from isoleucine to serine.
제안 방법
In order to determine the effect of long-term kimchi fermentation on microbes, enumeration of aerobic bacteria, yeast, Leuconostoc species and Lactobacillus species were carried out using selective media (Table 3). Total bacterial cells of kimchi decreased from 287 to 3 (1x105 CFU/g of kimchi) over a 36 weeks from 10 to 46 weeks (p<0.
성능/효과
In this study, the effect of long-term kimchi fermentation (46 weeks) at 5℃ on the pH, titratable acidity, organic acid, viable cell counts, amino acid, and PG activity were evaluated. Kimchi fermented for 10 weeks at 5℃ is acceptable, whereas kimchi fermented for 46 weeks at 5℃ is too sour.
참고문헌 (25)
Kang, J.H., Lee, J.H., Min, S. and Min, D.B. (2003)Changes of volatile compounds, lactic acid bacteria, pH, and headspace gases in kimchi, a traditional Korean fermented vegetable product. J. Food Sci., 68, 849-854
Lee, J.H., Lee, K.T. and Kim, M.R. (2005) Effect of gamma-irradiated red pepper powder on the chemical and volatile characteristics of kakdugi, a Korean traditional fermented radish kimchi. J. Food Sci., 70, 441-447
Ahn S.J. (1988) The effect of salt and food preservatives on the growth of lactic acid bacteria isolated from kimchi. Korean J. Soc. Food Sci., 4, 39-50
Kim, S.D., Kim, M.K., Kang, M.S., Lee, Y.G. and Kim, D.S. (2000) Effects of ark shell powder on the fermentation and quality of kimchi. Food Sci. Biotechnol.,9, 280-284
Park, I.K., Kim, S.H. and Kim, S.D. (1996) Effects of intial temperature of salt solution during salting on the fermentation of kimchi. J. Korean Soc. Food Sci. Nutr., 25, 747-753
Kim, J.H., Park, J.G., Lee, J.W., Kim, W.G., Chung, Y.J. and Byun, M.W. (2008) The combined effects of $N_2$ -packaging, heating and gamma irradiation on the shelf-stability of kimchi, Korean fermented vegetable. Food Control, 19, 56-61
National Rural Living Science Institute. (2001) Food composition tables. Sixth revision. Rural Development Administration. Korea
Park, H.O., Kim, Y.K. and Yoon, S. (1991) A study of enzyme system during kimchi fermentation. Korean J. Soc. Food Sci., 7, 1-7
Albright, S.C., Winston, W.L. and Zappe, C. (1999) Data analysis and decision making with Microsoft Excel. Pacific Grove, Brooks/Cole Publishing Co. CA, U.S.A
Jin, Q., Jung, J.Y., Kim, Y.J., Eom, H.J., Kim, S.Y., Kim, T.J. and Han, N.S. (2009) Production of L-lactate in Leuconostoc citreum via heterologous expression of L-lactate dehydrogenase gene. J. Biotechnol., 144,160-164
Ku, K.H., Cho, M.H. and Park, W.S. (2003) Characteristics analysis for the standardization of commercial kimchi. Korean J. Food Sci. Technol., 35, 316-319
Kim, J.Y., Park, E.Y. and Kim, Y.S. (2006)Characterization of volatile compounds in low-temperature and long-term fermented baechu kimchi. Korean J. Food Culture, 21, 319-324
Yoo, M.J., Kim, H.R. and Chung, H.J. (2001) Changes in physicochemical and microbiological properties in low-temperature and long-term fermented kimchi during fermentation. Korean J. Dietary Culture, 16, 431-441
Hong, S.I. and Park, W.S. (1999) High-pressure carbon dioxide effect on kimchi fermentation. Biosci. Biotechnol. Biochem., 63, 1119-1121
Kim, S.D., Oh, Y.A., Kim, K.H., No, H.K. and Yun, K.S. (2000) Effects of water extracts of spices on fermentation and enzyme activities of kimchi. Food Sci. Biotechnol., 9, 243-248
Kim, Y.C. (1996) Characteristics of the acid-tolerance mutant Leuconostoc spp. and its effect as a starter for the acidification-retardation of kimchi. PhD thesis, Dept. of Microbiol. Eng. Kon-Kuk Univ., Seoul, Korea
Chae, M.H. and Jhon, D.Y. (2007) Effects of commercial fructooligosaccharides on Bifidobacteria kimchi fermentation. Korean J. Food Sci. Technol., 39, 61-65
Lim, C.R., Park, H.K. and Han, H.U. (1989) Reevaluation of isolation and identification of gram-positive bacteria in kimchi. Korean J. Microbiol., 27, 404-414
Cho, Y. and Rhee, H.S. (1979) A study on flavorous taste components in kimchi-on free amino acids. Korean J. Food Sci. Technol., 11, 26-31
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