| effect of seasonal variations and collection form on antioxidant activity of propolis from san juan, argentina. | propolis was included in the argentine food code as a functional food. the chemical parameters and antioxidant properties of propolis samples from the same colonies of apis mellifera in san juan (cuyo region, western argentine) were compared every month for 1 year using two collection methods. chemical parameters were analyzed by the spectrophotometric method and fingerprinting using high-performance liquid chromatography with ultraviolet detection. the antioxidant activities of propolis samples ... | 2009 | 20041790 |