Authors: Ahmad, Farediah
Salleh, Wan Mohd
Sirat, Hasnah Mohd
Yen, Khong Heng
Title: Chemical compositions and antibacterial activity of the leaf and stem oils of Piper porphyrophyllum (Lindl). N.E. Br.
Language (ISO): en
Abstract: The essential oils obtained by hydrodistillation from the fresh leaf and stem of Piper porphyrophyllum N.E. Br. were analyzed by GC and GC/MS. Thirty four constituents were identi-fied in the leaf oil, while thirty eight constituents were identified in the stems oil. The most abundant components in the leaf oil included bicyclogermacrene (14.7 %), α-copaene (13.2 %) and β-phellandrene (9.5 %) while sabinene (15.5 %), bicyclogermacrene (12.3 %) and α-copaene (8.1 %) were the main constituents in the stem oil. The evaluation of antibacterial activity by using microdilution method revealed that both oils were moderately active against all the Gram-positive bacteria (Staphylococcus aureus, Bacillus subtilis) and Gram-negative bacteria (Pseudomonas aeruginosa, Pseudomonas putida and Escherichia coli) with minimum inhibitory concentration (MIC) values in the range 125-1000 μg/ml.
Subject Headings: antimicrobial activity
chemical compositions
essential oils
Piper porphyrophyllum
Issue Date: 2012-11-15
Appears in Collections:Original Articles

Files in This Item:
File Description SizeFormat 
Ahmad_02072012_proof.pdfDNB356.15 kBAdobe PDFView/Open

This item is protected by original copyright

All resources in the repository are protected by copyright.