Journal of Plant Biotechnology : eISSN 2384-1397 / pISSN 1229-2818

Table. 2.

Table. 2.

The radical scavenging activity of the extract from Dolwoe (Gynostemma pentaphyllum Makino) leaves tea with different ethanol concentrations

SamplesRC50 (µg/mL)a

DPPHNitric oxideSuperoxideHydroxyl
Distilled water extract294.07±4.32 e335.47±0.76 c302.15±7.32 b652.70±65.36 d
20% ethanolic extract227.04±3.01 c313.63±3.95 b210.47±5.54 a644.08±25.07 d
40% ethanolic extract202.85±6.18 b255.42±1.70 a204.38±13.81 a489.56±13.22 bc
60% ethanolic extract220.88±0.46 c253.07±3.06 a366.61±12.57 c502.93±9.40 c
80% ethanolic extract190.56±0.87 a398.44±3.16 d>1000 d364.14±3.49 a
99.5% ethanolic extract265.20±0.95 d>1000 e>1000 d378.66±4.73 ab

Means with different letters (a-e) in the same column are significantly different at p<0.05 (SPSS, Tukey)

RC50 (µg/mL) Amount required for a 50% reduction of radicals

J Plant Biotechnol 2019;46:37-44
© 2019 J Plant Biotechnol