2.10. Data analysis
All the data were expressed as mean ± standard deviation (S.D.)in each group. Statistical calculations by SPSS version 10.0 soft-ware (SPSS Inc., Chicago, USA) were carried out. One-way ANOVAwas applied for determining differences between results of sam-ples. Duncan test was taken to compare the data. The values were considered to be significantly different when the P-value was lessthan 0.05