• YAKHAK HOEJI
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• v.37 no.2
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• pp.187-192
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• 1993

Approximately 1% of intestinal bacteria of human and rats was alkalotolerant. Among these bacteria of human, bacteria producing $\beta$-glucosidase, $\beta$-glucuronidase and sulfotransferase were 40%, 4% and 0%, respectively. Among alkalotolerant intestinal bacteria of rats, bacteria producing, these enzymes were 70%, 8% and 0%, respectively. $\beta$-Glucosidase and $\beta$-glucuronidase of alkalotolerant intestinal bacteria of human and rat were induced by the medium of high pH: these enzymes activities were increased by elevating pH of the medium, but the growths were not changed. The enzyme activities at the medium of pH 7 were about ten-fold higher than those at the medium of pH 6.