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KMID : 0881720120270020109
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Journal of Food Hygiene and Safety
2012 Volume.27 No. 2 p.109 ~ p.116
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Antimicrobial Activity of Ginger(Zingiber officinale Roscoe) Oleoresin by Supercritical Fluid Extraction
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Lee Myung-Hee
Kim Kyung-Tack
Kim Sung-Soo
Lee Kyoung-Hae
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Abstract
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The study indicated that antimicrobial activity about gram positive and gram negative bacteria of ginger-oleoresin(GO) extract with the condition of ethanol and supercritical fluid extractions. As the concentration of extraction increases, the clear zone of GO ethanol extract also increased dependently. This led the antimicrobial activity of gram positive bacteria to take bigger place than gram negative bacteria especially in Listeria monocytogenes. There was a high antimicrobial activity in E-III treatment where the ratio of the ginger powder extract to ethanol extraction was 1:6. It was quite effective to treat the antimicrobial activity of GO ethanol extract under 80o C and there was not big difference in the intervals which were the extraction time - 1 to 7 hours. The antimicrobial activity of supercritical fluid extract seemed to take the biggest place in Listeria monocytogenes. From the supercritical fluid extract, it was shown the strong ability of antimicrobial activity in the condition with 100 bar 35o C, 250 bar 35o C and 250 bar 65o C. Furthermore, according to the case of solvent extract, there was not any significant difference in the antimicrobial activity with condition of extraction. However, there was significant antimicrobial activity in E-III treatment of 100 bar and 500 bar of extraction pressure, and 35oC and 65o C of extraction temperature.
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KEYWORD
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ginger oleoresin(GO), antimicrobial activity, supercritical fluid extraction
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