Antioxidant Capacity of Some Selected Medicinal Plants in East Nusa Tenggara, Indonesia: The Potential of Sterculia quadrifida R.Br.

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Abstract
Free Radicals and Antioxidants,2018,8,2,96-101.
Published:April 2018
Type:Original Article

Antioxidant Capacity of Some Selected Medicinal Plants in East Nusa Tenggara, Indonesia: The Potential of Sterculia quadrifida R.Br.

Theodore Yehezkiel Kristoferson Lulan1,2, Sri Fatmawati1, Mardi Santoso1, Taslim Ersam1*

1Department of Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Sepuluh Nopember, Sukolilo, Surabaya, East Java, 60111, INDONESIA.

2Department of Chemistry, Faculty of Science and Engineering, Universitas Nusa Cendana, Penfui, Kupang, East Nusa Tenggara, 85001, INDONESIA.

Abstract:

Background: Medicinal plants derived natural product such as alkaloids, flavonoids and terpenes. The traditional uses claim that medicinal plants of NTT are potential folk medicine but very little research has been conducted on these plants. Objective: The present study is directed towards evaluating naturally effective antioxidant of twenty-four traditional medicinal plants collected from Kupang, East Nusa Tenggara (NTT) using in vitro models. Method: The antioxidant activities were determined by using the free radical scavenging assays 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2-2”-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). Analysis of total flavonoid and phenolic contents were expressed as Quercetin Equivalent (QE) and Gallic Acid Equivalent (GAE), respectively. Statistical methods are used in data analysis include mean or standard deviation, and regression analysis. Result: Methanol extract of Sterculia quadrifida R. Br. root exhibited the highest DPPH radical scavenging activity with IC50 value of 3.11μg/mL, followed by Schleichera oleosa and Euphorbia hirta L. extracts with IC50 values of 10.05 and 10.09 μg/mL, respectively. Methanol extract of S. quadrifida also showed highest ABTS radical scavenging activity with IC50 value of 7.29 μg/mL, followed by Eugenia jambolana Lam. and Lamea grandus with IC50 value of 9.15 and 12.29 μg/mL, respectively. S. quadrifida extract showed high flavonoid and phenolic content with 661.85 mg of GAE and 116.84 mg of QE per 100 g of extracts. Conclusion: The present study gives scientific evidences that twenty four samples of NTT plants have high free radical scavenging capacity. Strong radical scavenging activity of these plants especially S. quadrifida could be considered as a potential source of natural antioxidants.

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Founded:  In 2004, as the PHCOG.NET – a non-profit private organization dedicated to Natural Products Research leading to develop promising drugs. Our main mission is to make information on herbal drug research readily available in different formats to suit the individual needs. About Journal : Free Radicals and Antioxidants [ISSN: 2231-2536] is an online peer reviewed publication dedicated to publishing novel, original findings in the field of free radical biology and both natural and synthetic antioxidants. Free radicals, which are defined as molecules containing one or more unpaired electrons in their outmost atomic or molecular orbital have emerged as double edged swords.The Free Radicals and Antioxidants Journal aims to foster the dissemination of scientific information by publishing manuscripts that provide new insights into the biology of free radicals, including their generation, degradation, modulation, role in cellular function and cell signaling. The submission of uninvited expert reviews and research articles in all areas of Free Radical Biology and Antioxidants are also welcomed. Free Radicals and Antioxidants publishes full research papers presenting original, high quality research, critical review articles providing comprehensive analysis of research development within a defined area and editorial commentaries on key topical issues in Free Radical and Antioxidant Biology.
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