Chemical- and Cell-based Antioxidant Capacity of Methanolic Extracts of Three Commonly Edible Plants from Zingiberaceae Family


Free Radicals and Antioxidants,2017,7,1,57-62.
Published:September 2016
Type:Original Article

Chemical- and Cell-based Antioxidant Capacity of Methanolic Extracts of Three Commonly Edible Plants from Zingiberaceae Family

Michelle Chiang1, Yasin Kurmoo2 and Teng-Jin Khoo1*

1Centre for Natural & Medicinal Product Research, School of Pharmacy, Faculty of Science, University of Nottingham Malaysia Campus, Jalan Broga, 43500, Semenyih, Selangor, MALAYSIA.

2Faculty of Science, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.


Background: Edible plants belonging to the Zingiberaceae family display various antioxidative properties and widely used as folklore medicines. Three edible plants in Zingiberaceae family; namely Boesenbergia rotunda, Phaeomeria imperialis and Zingiber officinale were selected for secondary metabolites extraction using methanol. All crude extracts were investigated to evaluate their phenolics and flavonoids contents and further compare their antioxidant properties. Methods: Total phenolic content and total flavonoid content were evaluated using Folin-Ciocalteu method and Aluminium Complexation Reaction respectively. Conventional DPPH (2,2-diphenyl-1-picryl-hydrazyl), revolutionary CUPRAC (cupric ion reducing antioxidant capacity) and cellular antioxidant activity (CAA) in vitro assays were employed to evaluate the antioxidant activities of methanolic plant extracts for the first time. Results: DPPH and CUPRAC antioxidant assays resulted in similar trend to total flavonoid content in the order Z. officinale >P. imperialis>B. rotunda where as P. imperialis revealed highest phenols content and displayed highest CAA. Conclusion: Methanolic extract of Z. officinale showed highest free radical scavenging ability and hence flavonoids present may potentially act as natural source of antioxidant.

About Journal

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.
Distinctions:  The most widely read, cited, and known Free Radicals and Antioxidants and website is well browsed with all the articles published. More than 20,000 readers in nearly every country in the world each month
Editorial Board
Subjects Covered : Natural Products, Free Radical Biology, Antioxidants
ISSN : 2231-2536 ; Frequency : Half Yearly - Rapid at a time publication (2 issues/year)
Indexed and Abstracted in : Chemical Abstracts, Excerpta Medica / EMBASE, Google Scholar, CABI Full Text, Ulrich’s International Periodical Directory, ProQuest, Journalseek & Genamics, PhcogBase, EBSCOHost, Academic Search Complete, Open J-Gate, SciACCESS.
Rapid publication: Average time from submission to first decision is 30 days and from acceptance to In Press online  publication is 45 days.
Open Access Journal: Free Radicals and Antioxidants is an open access journal, which allows authors to fund their article to be open access from publication.