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Chemical Composition and Antimicrobial Activity of the Essential Oil from Oleoresin of Protium neglectum S

Abstract:

The hydrodistilled oil from the oleoresin of Protium neglectum S., was analyzed by GC-MS. The yield of the resin oil was 1.0 % (w/w), in which twenty-eight compounds were identified, accounting for 99.3 % of the total oil. The most abundant compounds were the oxygen-ated monoterpenes (78.4%), with piperitenone (25.4%) as the major constituent, followed by thymol (17.5%), durenol (15.6%), methyl eugenol (9.2%), α-terpineol (6.9%) and p-cymene (5.2%). The antimicrobial activity using the disk susceptibility test as well as the minimum inhibitory concentra-tion (MIC) on four pathogenic and non pathogenic Gram (+) and Gram (−) was screened. It was found that the essential oil from the resin exhibited antimicrobial activity on the Gram (+) bacteria, especially against Bacillus subtilis. © 2007 Taylor & Francis Group, LLC.