Table 1.

A value of L929 cell culture at 2, 4 and 7 days

Groups	2 days	4 days	7 days
Normal control	0.089 ± 0.021	0.710 ± 0.124	1.091 ± 0.152
PVA	0.140 ± 0.047	0.699 ± 0.061	1.082 ± 0.040
CoPP	0.163 ± 0.052	0.769 ± 0.151	1.088 ± 0.277
Positive control	0.003 ± 0.016	0.024 ± 0.018	0.004 ± 0.021