Chemical composition and antibacterial activity of (L.) essential oil from Quebec, Canada.

The chemical composition of L. essential oil from the Saguenay-Lac-St-Jean region of Quebec, Canada was analyzed by gas chromatography-flame ionisation detector (GC-FID) and gas chromatography-mass spectrometry (GC-MS), and the antibacterial activity of the oil was tested against and . Forty-five (45) compounds were identified from the GC profile. The main components were 1-nonene (40.1%), α-phellandrene (26.0%) and ρ-cymene (6.6%). The essential oil demonstrated antibacterial activity against . (MIC = 468 µg·mL; MIC = 6869 µg·mL) and . (MIC = 368 µg·mL; MIC = 773 µg·mL). Dodecanoic acid was found to be active against both bacteria having a MIC and MIC of 16.4 µg·mL and 95 µg·mL, respectively for . and a MIC and MIC of 9.8 µg·mL and 27.3 µg·mL, respectively for . . In addition, 1-decene and -cyclodecene were also found to be active against . .