highly significantP < 0.01
After 1 month of storage the differences reported to the control were quantified as non-significant (P > 0.1) and significant (P < 0.05), after 3 months the changes were significant (P < 0.05) and highly significant (P < 0.01), while over 6 months of storage the recorded differences have became extremely significant P < 0.001) for all jam samples.