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

This paper was retracted on 1 March 2008, see Molecules 2008, 13(3), 488-489.

Molecules 2007, 12(8), 2047-2060; doi:10.3390/12082047
Article

Antibacterial Effect of Five Zingiberaceae Essential Oils

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Received: 1 August 2007; in revised form: 20 August 2007 / Accepted: 22 August 2006 / Published: 23 August 2007
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Abstract: 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.
Keywords: Antibacterial activity; ginger; galangal; turmeric; kaempferia; bastard cardamom
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.

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MDPI and ACS Style

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

AMA Style

Norajit K, Laohakunjit N, Kerdchoechuen O. Antibacterial Effect of Five Zingiberaceae Essential Oils. Molecules. 2007; 12(8):2047-2060.

Chicago/Turabian Style

Norajit, Krittika; Laohakunjit, Natta; Kerdchoechuen, Orapin. 2007. "Antibacterial Effect of Five Zingiberaceae Essential Oils." Molecules 12, no. 8: 2047-2060.


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