ISMAIL, 050911014 (2013) STUDI POTENSI EKSTRAK ETANOL 80% GARUGA FLORIBUNDA, OCHROSIA AKKERINGAE, TABERNAEMONTANA PANDACAQUI MELALUI UJI AKTIVITAS ANTIRADIKAL BEBAS SECARA IN VITRO. Skripsi thesis, UNIVERSITAS AIRLANGGA.

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Abstract

Indonesia is well known in biodiversity rich of plant species which only small proportion of the species have been investigated in detail. This study aimed to investigate free-radical scavenging activity of three plants obtained from exploration in Alas Purwo National Park in Banyuwangi, East Java. Leaf and stem ethanol 80% extract of Garuga floribunda, Ochrosia akkeringae, and Tabernaemontana pandacaqui were tested for their free-radical scavenging activity using 2,2-Diphenyl-1-picrylhydrazyl (DPPH) by TLC-autography and spectrophotometry method. The TLC-autography result showed that all samples had free-radical scavenging activity, and the result from spectrophotometry showed that the lowest IC50 value was ethanol 80% extract of Garuga floribunda leaf with IC50 value 6,68 ppm whereas IC50 value of vitamin C was 3,11 ppm. The highest IC50 value was ethanol 80% extract of Ochrosia akkeringae leaf with IC50 value 214,64 ppm. Plant with low IC50 value may be potential to be developed as medicinal drug.

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