To test the effect of the crude extract: antioxidant plant 26 type within the University phayao. Extraction of the solvent and the shell by ethanol and antioxidant vitamin test with test results from the DPPH method found.
To test the antioxidant activity of the extracts of plants, 26 species within the University District. The leaves and bark with solvent ethanol. Then test the antioxidant activity by DPPH results of the tests showed that.