Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 50, Issue 9, Pages 2531-2536Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf011174i
Keywords
probiotic; lactic acid bacteria; bile tolerance; acid tolerance; fermented products
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Lactic acid bacteria were screened from feces of newborn baby and from dongchimi Selection criteria employed included the ability of strains to withstand environmental conditions such as low pH, high bile concentration, and oxygen. The isolates were applied to the juice of various vegetables, and fermentabilities of isolates were compared. Strains F20-3, F35-3, and F35-6 showed high stability compared to the other strains at pH 3.0 and 2.3. Strains D1 and D2 showed the highest survival at pH 3.0 and survived at 1% high bile concentration. The selected strains were able to survive at low pH and relatively high bile concentration and were not affected by oxygen. The growth of isolates was > 10(7) cfu/mL in natural media, and strains were not affected by the pH values of the vegetables. Therefore, isolated strains are thought to survive through the intestinal ecosystem and are considered to be suitable for application of the fermented product using various vegetables for their functionality. The isolates were identified as Lactobacillus plantarum and Lactobacillus fermentum.
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