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International Journal of Food Sciences and Nutrition Volume 65, 2014 - Issue 5
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Research Article

Antimicrobial activities of various fractions of longan (Dimocarpus longan Lour. Fen Ke) seed extract

Huang-Chung TsengLaboratory of Antrodia Certification Center, Joben Bio-medical Co, Ltd. PingtungTaiwan;Department of Food Science, National Pingtung University of Science and Technology PingtungTaiwan
,
Wan-Ting WuDepartment of Food Science, National Pingtung University of Science and Technology PingtungTaiwan
,
Ho-Shin HuangLaboratory of Antrodia Certification Center, Joben Bio-medical Co, Ltd. PingtungTaiwan
&
Ming-Chang WuDepartment of Food Science, National Pingtung University of Science and Technology PingtungTaiwanCorrespondence[email protected]
Pages 589-593 | Received 30 Jul 2013, Accepted 13 Jan 2014, Published online: 17 Feb 2014
 
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Abstract

The antimicrobial activities of longan (Dimocarpus longan Lour. Fen ke) seed extracts were investigated using a disc diffusion method and also determining the minimal inhibitory concentration. The DL-P01-SI01 fraction showed that the strongest activity against Staphylococcus aureus and methicillin-resistant S. aureus at MIC 64 μg/mL, which was found to be due to the phenolic compounds. The HPLC analysis showed that the major phenolic compounds are gallic acid, corilagin, ethyl gallate and ellagic acid.

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