Antioxidant properties of selected Etlingera and Zingiber species (Zingiberaceae) from Borneo island

Farrawati Sabli, and Maryati Mohamed, Datin and Asmah Rahmat, and Halijah A. Ibrahim, and Mohd Fadzelly Abu Bakar, (2012) Antioxidant properties of selected Etlingera and Zingiber species (Zingiberaceae) from Borneo island. International Journal of Biological Chemistry , 6 (1). pp. 1-9. ISSN 1819-155X

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Official URL: http://dx.doi.org/10.3923/ijbc.2012.1.9

Abstract

In this study, total phenolic and flavonoid contents as well as antioxidant properties of methanolic extracts of rhizomes and stems of four Zingiberaceae (Etlingera belalongensis, Etlingera uelutina, Zingiber uinosum and Zingiber pseudopungens) were investigated. Evaluation of antioxidant activity was conducted using l,l-diphenyl-2-picrylhydrazyl free radical-scavenging (DPPH) assay, 2-2'-azinobis-3-ethylbenzothioazaline-6-sulphonate radical scavenging (ABTS) assay and Ferric-Reducing Antioxidant Power (FRAP). The results showed the total phenolic and total flavanoid contents were in the range of 5.3-41.7 mg gallic acid equivalent/g and 1.09-5.86 mg catechin equivalent/g of dry sample, respectively. The antioxidant activities of the extracts as assessed by using DPPH and FRAP assays were strongly correlated with all phytochemical tested (p<0.05). As a conclusion, selected tropical gingers found in Sabah investigated in this study can be developed as natural antioxidant agents.

Item Type:Article
Uncontrolled Keywords:Antioxidant activity, Total flavanoid, Total phenolic contents, Zingiberaceae, Etlingera, Etlingera belalongensis, Zingiber, Zingiber officinale, Zingiberaceae
Subjects:?? QD241-441 ??
S Agriculture > SB Plant culture
Divisions:SCHOOL > School of Engineering and Information Technology
ID Code:5579
Deposited By:IR Admin
Deposited On:10 Dec 2012 15:37
Last Modified:18 Feb 2015 15:37

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