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Commentary published on 5 September 2007, see Molecules 2007, 12(9), 2179-2180.

Retraction published on 1 March 2008, see Molecules 2008, 13(3), 488-489.

Open AccessArticle

Antibacterial Effect of Five Zingiberaceae Essential Oils

School of Bioresources and Technology, King Mongkut’s University of Technology Thonburi, Bangkhuntein, Bangkok, Thailand
Authors to whom correspondence should be addressed.
Molecules 2007, 12(8), 2047-2060;
Received: 1 August 2007 / Revised: 20 August 2007 / Accepted: 22 August 2006 / Published: 23 August 2007
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Essential oil obtained by hydrodistillation and two different solvent extractions (petroleum ether and ethanol) from five Zingiberaceae species: ginger (Zingiber officinale Roscoe.), galanga (Alpinia galanga Sw.), turmeric (Curcuma longa L.), kaempferia (Boesenbergia pandurata Holtt.) and bastard cardamom (Amomum xanthioides Wall.) was characterized. Volatile components of all extracts were analyzed by gas chromatographymass spectrometry (GC-MS). The major components of ginger, turmeric, galangal, bastard cardamom and kaempferia were zingiberene, turmerone, methyl chavicol, and γ-terpinene, respectively. Their antibacterial effects towards Escherichia coli, Staphylococcus aureus, Bacillus cereus and Listeria monocytogenes were tested by a disc diffusion assay. Essential oil of kaempferia and bastard cardamom obtained by hydrodistillation extraction could inhibit growth of all tested bacteria. Essential oil of ginger extracted by hydrodistillation had the highest efficiency against three positive strains of bacteria (S. aureus, B. cereus and L. monocytogenes), with a minimum concentration to inhibit B. cereus and L. monocytogenes of 6.25 mg/mL. View Full-Text
Keywords: Antibacterial activity; ginger; galangal; turmeric; kaempferia; bastard cardamom Antibacterial activity; ginger; galangal; turmeric; kaempferia; bastard cardamom

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Norajit, K.; Laohakunjit, N.; Kerdchoechuen, O. Antibacterial Effect of Five Zingiberaceae Essential Oils. Molecules 2007, 12, 2047-2060.

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