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E-Journal of Chemistry
Volume 8 (2011), Issue 2, Pages 721-726
http://dx.doi.org/10.1155/2011/960193

Antioxidant Enriched Fractions from Zingiber Officinale Roscoe

Ismail Rahath Kubra, Kulathooran Ramalakshmi, and Lingamallu Jagan Mohan Rao

Plantation Products, Spices and Flavour Technology Department, Central Food Technological Research Institute, Mysore, India

Received 20 July 2010; Accepted 15 September 2010

Copyright © 2011 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Ginger rhizome (Zingiber officinale Roscoe) has many diverse properties and medicinal values such as antioxidant potential combined with the properties of a spice. Dried ginger (DG) were extracted with aqueous ethanol and freeze-dried. The extract was evaluated for antioxidant potential, using 1,1'-diphenyl-2-picryl-hydrazyl radical scavenging, antioxidant capacity and reducing power assays. DG extract was further fractionated into methanol (Mfr) and water-soluble (Wfr) fractions. The Mfr exhibited higher antioxidant capacity when compared to DG extract. Higher antioxidant potential of the methanol fraction may be due to the presence higher polyphenols and [6]-gingerol content. This suggests that alcoholic soluble fraction possess enormous scope to enhance the antioxidant potential when used as a supplement in various food as well as pharmaceutical formulations / products.