Antioxidant activities, phenolic and tannin contents of paper mulberry (Broussonetia papyrifera) extract

This research aimed to determine the quantity of phenolic and tannin contents in paper mulberry (Broussonetia papyrifera) extract. An antioxidant activity of the ethanolic extract was also investigated. Crude extract of dry old leaves of paper mulberry was found to have the highest percent yield (5.09 ± 0.19) and phenolic content (262.25 ± 9.17 mg GAE /100g), while the dry young leaf extract had the highest tannin content (213.16 ± 24.26 mg/100g). The highest antioxidant activity with IC₅₀ value of 0.29 ± 0.02 mg/mL was found in the dry bark extract. Also, four parts of dried paper mulberry samples were analyzed for the quantities of total phenolic content, tannins and antioxidant activities in hot water extracts. The extracts of dry old leaves were found to have the highest phenolic content (565.67±4.51 mg GAE/100g of extract) and tannin content (16.73 ± 5.37 mg /100g of extract). The highest antioxidant activity with IC₅₀ value of 0.33±0.08 mg/mL was found in the dry bark extract.