EXAMINE OF CONDITIONING AGENT EXTRACTED AND ANTIBACTERIAL, ANTIOXIDANT ACTIVITIES OF POLYPHENOL FROM YELLOW OXALIS (OXALIS CORNICULATA L.)

Abstract

Background: Yellow oxalis (Oxalis corniculata L.) is known from experience with the treatment of cough, sore throat, antiseptic, pimples, sores limbs, but has not yet studied.

Objectives: In this study, we determine the conditioning agent extracted, antibacterial and antioxidant effects of polyphenol from yellow oxalis.

Methods: Determining the purity of medicinal herb, examining the factors to be extracted polyphenol content, prequalitating tests and surveying antibacterial, antioxidant activity from yellow oxalis.

Results: The most suitable extraction conditions are: methanol (90°); methanol:sample rate (1:10, g/mL); temperature (60 °C); time (6 hours). In addition, yellow oxalis extract (100 mg/mL) inhibited the growth of Streptococus feacalis (10.9 mm), Proteus mirabili (18.2 mm), Staphylococus aureus (21.4 mm) and Escherichia coli (25.2 mm). This study also evaluated the ability to capture free radicals DPPH of yellow oxalis extract (IC₅₀ = 42.27 mg/mL) compared with vitamin C (IC₅₀ = 45.81 mg/mL).

Conclusions: Yellow oxalis is one of medicinal species contain polyphenol compounds which have antibacterial and antioxidant activities. This plant has the potential pharmaceutical and functional foods to serve human health.