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Effect of Ethanolic Extract of Schizandra chinensis for the Delayed Ripening Kimchi Preparation  

Moon, Young-Ja (Dept. of food and Nutrition, Woosong Information College)
Park, Sun (Dept. of food Science and Technology, Chungnam National University)
Sung, Chang-Keun (Dept. of food Science and Technology, Chungnam National University)
Publication Information
The Korean Journal of Food And Nutrition / v.16, no.1, 2003 , pp. 7-14 More about this Journal
Abstract
This study mainly focused on to investigate the effects of Schizandra chinensis on the growth of a bacterium, CS6 which was isolated from kimchi. CS6 was final]y identified to lactobacillus plantarum that caused acidification of kimchi. The ethanolic extract of Schizandra chinensis(EES) inhibited the growth of L. plantarum. Minimum inhibition concentration of crude EES on L. plantarum was 62.5mg/$m\ell$. In broth culture, 5$\mu\textrm{g}$/$m\ell$ of EES completely inhibited the growth of L. plantarum during fermentation. The addition of 0.4% of EES has no apparent effect on quality including the taste and color on kimchi. It was expected that EES-containing kimchi could extend the period of preservation. Analysis of organic acids in water fractions of EES was carried out by HPLC. It is apparent that antimicrobial active fractions contained the highest concentration of succinic acid, a little tartaric acid and malic acid. Among these organic acids, succinic acid showed the strong inhibitory effect against L. plantarum CS6 in vitro. Succinic acid-containing kimchi with a concentration of 0.4 and 0.5% had the inhibitory effect on growth of L. plantarum. Inhibitory effect of EES on amylase, cellulase and pectinase was also tested. In conclusion, the present experiment demonstrated that EES inhibited the growth of L. plantarum, and various enzyme activity. EES-containing kimchi was sustained the hardness, and initial acidity during fermentation. EES was considered as the possible additive of kimchi process and EES added in kimchi increase the quality, and storage period of kimchi.
Keywords
Lactobacillus plantarum; ethanolic extract of Schizandra chinensis(EES); antimicrobial active fraction; kimchi;
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