2.9. Statistical analysis
Values shown in tables and graphs was the mean of at
least two determinations ± SD. Discrepancies among
determinations of each sample was tested with the
crite rion Q (Hajioannou et al., 1997), and found to be
Qexp < Qcal for all the samples which means that all
determinations for each sample are acceptable (Qcal is
taken from statistical tables).