ANTIMICROBIAL COMPOSITION CONTAINING P. NEPALENSIS AND P. JAPONICA EXTRACTS

摘要

PURPOSE: A composition containing extract of Persicaria nepalensis or Persicaria japonica is provided to ensure excellent antibacterial activity without side effect. CONSTITUTION: A composition with antibacterial activity contains extract of Persicaria nepalensis or Persicaria japonica. The extract is prepared using low alcohol of C1-C6, hexane, dichloromethane, ethyl acetate, or water. A method for preparing the extract comprises: a step of refluxing extract of Persicaria nepalensis or Persicaria japonica with one of the solvents at 0-30 °C for 12-36 hours to prepare extract; a step of filtering the extract; a step of vacuum-drying the extract at 20-60 °C for 6-12 hours; and a step of freeze-drying the dried extract at -40 to 20 °C for 24-48 hours. A functional food composition with antibacterial activity contains the extract as an active ingredient.