Abstract
Determination was made of the antioxidative activity of crude extracts obtained using organic solvents such as methyl alcohol, ethyl alcohol, acetone, hexane and ethyl acetate from Brazilian, Chinese, Australian, New Zealand and Japanese propolis (obtained between September and November, 1997).
The extracts were present as pastes and brownish-yellow in color and all contained α-tocopherol at high levels. Interactions may possibly occur between α-tocopherol and other substances since the antioxidative activity of this extract is not always in proportion to its amount.
