Antioxidant activities, phenolic and tannin contents of paper mulberry (Broussonetia papyrifera) extract Sirita Jinda1,*, Chomsawan Banthot1, Yodsoontorn Piyada1, Kornochalert Soonthree1, Lapinee Chaipat2, Jumpatong Kanlaya2 1Faculty of Science and Technology, Chiang Rai Rajabhat University, Chiang Rai, 57100, Thailand 2Department of Chemistry, School of Science, University of Phayao, Phayao, 56000, Thailand *Corresponding author e-mail: jsirita028@gmail.com
Online published on 15 October, 2020. Abstract 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. Top Keywords Paper mulberry, Broussonetia papyrifera, Antioxidant activities. Top |