Determination of antioxidant activity, total phenolic and flavonoid content of hornstedtia spp. (Zingiberaceae)

Chua, Angela Ai Ching (2008) Determination of antioxidant activity, total phenolic and flavonoid content of hornstedtia spp. (Zingiberaceae). Universiti Malaysia Sabah. (Unpublished)

[img]
Preview
Text
ae0000001999.pdf

Download (2MB) | Preview

Abstract

In this study, two species of Hornstedtia which are Hornstedtia tomentosa and H. scyphifera were investigated to determine their antioxidant activity, total phenolic and flavonoid content. Besides that, relationship between the antioxidant activities and the total phenolic and flavonoid content of these two Hornstedtia species were also determined. The plants were separated and tested into different parts: leaf, stem and rhizome. The plants were screened for antioxidant activity using 2, 2'-diphenyl-l-picrylbydrazyl (DPPH) radical scavenging activity assay. To determine phenolic and flavonoid content of these ginger species, folin-ciocalteau and colometric aluminium chloride were used respectively. The results showed the highest total phenolic and flavonoid content and antioxidant activity in H. tomentosa rhizome (1.855 mg GAE/g, 1.826 mg CE/g and 85.77%, respectively). The lowest total phenolic content was revealed in H. scyphifera rhizome (0.340 mg GAE/g). The lowest flavonoid content and antioxidant activity was showed in H. scyphifera stem (0.159 mg CE/g and 42.19%, respectively). These study showed that there is strong correlation between phenolic and flavonoid content in Hornstedtia species (r = 0.984, P < 0.05) whereas antioxidant activity were not highly correlated with phenolic and flavonoid content (r = 0.176, p>0.05 and r = 0.264, p > 0.05, respectively). These study showed that H. tomentosa and H. scyphifera exhibited a potential as natural antioxidant.

Item Type: Academic Exercise
Uncontrolled Keywords: antioxidant activity, total phenolic, flavonoid content, Hornstedtia tomentosa, H.scyphifera
Subjects: Q Science > QD Chemistry
Divisions: SCHOOL > School of Science and Technology
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 12 Mar 2014 08:40
Last Modified: 12 Oct 2017 06:14
URI: http://eprints.ums.edu.my/id/eprint/8471

Actions (login required)

View Item View Item

Browse Repository
Collection
   Articles
   Book
   Speeches
   Thesis
   UMS News
Search
Quick Search

   Latest Repository

Link to other Malaysia University Institutional Repository

Malaysia University Institutional Repository