Table 6. Heat and pH stability of S. flavescens and S. chinensis 30% ethanol extract against Streptococcus mutans KCCM 40105

Heat treatments
Samples1)	Clear zone on plate (mm/disk)
	Control	Heating temperature (° C)
		60	80	100	121
SF	10.17±0.162)a3)	10.30±0.44a	9.68±0.17a	8.54±0.46b	9.90±0.45a
SC	15.00±2.41ns4)	13.13±1.27	14.05±2.05	13.09±0.87	12.94±1.59
pH treatments
Samples1)	Control	pH
		2	4	6	8	10
SF	10.27±0.71ab	9.11±0.32c	9.60±0.21bc	10.27±0.71ab	10.82±0.27a	10.93±0.75a
SC	13.16±1.67a	16.36±2.06a	11.37±1.53b	-5)	-	-

SF, Sophorae flavescens; SC, Schizandra chinensis.
All values are mean±SD (n=3).
Means with different superscript letters in the same row are significantly different at p<0.05 by Duncan’s multiple range test. a>b>c.
Means with letters in the same row are not significantly different at p<0.05 by Duncan’s multiple range test.
Not detected.