All experiments were run in triplicate. The experimental
data were subjected to One-way Analysis of Variance
(ANOVA) and the differences between means were evaluated
by Duncan’s Multiple Range Test. For pair comparison,
T-test was used (Steel and Torrie 1980). Data analysis was
performed using a SPSS package (SPSS 14.0 for Windows,
SPSS Inc, Chicago, IL, USA).