the essential oil of stachys lavandulifolia vahl (lamiaceae) was isolated by hydrodistillation of the aerial parts of the plant, with a yield of 0.25%. the chemical composition of volatile oil was analyzed by capillary gc and gc/ ms. the main components were germacrene-d (13.2%), ?-phellandrene (12.7%), ?-pinene (10.2%), myrcene (9.4%), ?-pinene (8.4%) and z-?-ocimene (5.8%).

The analysis by GC-MS, of the essential oil of the fruits from this species permitted the identification of nine chemical constituents, representing 86.99 % and having as majorities: trans β-ocimene (33.90 %), linalool (23.27 %) and undecanone (16.19 %). The essential oil was submitted to analysis for the verification of the antibacterial activity, by the method of diffusion in paper discs in M...

This investigation aims to assess the chemical composition and antioxidant properties of Origanum vulgare var. aureum L. essential oil (OEO). The was obtained with a 0.34% (v/w dried weight) yield investigated by gas chromatography-mass spectrometry (GC–MS) analysis. main compounds OEO were found be gamma-terpinene (22.96%), para-cymene (14.72%), germacrene (11.64%), beta-trans-ocimene (9.81%),...

Antimicrobial activity of the essential oils obtained from leaves, root and the seeds of Diplotaenia damavandica Mozaffarian, Hedge & Lamond, an endemic plant to Iran, was determined against 10 microorganisms using the disk susceptibility test as well as measuring minimum inhibitory concentrations. The results showed that all three oils had antibacterial activity against Bacillus subtilis, Stap...

The essential oil isolated from fresh aerial parts of Hypericum perforatum L. was analyzed by GC and GC/MS. One hundred and thirty four identified compounds accounted for 98.7% of the total oil. The main components of the oil were: germacrene D (18.6%), (E)-caryophyllene (11.2%), 2-methyloctane (9.5%), α-pinene (6.5%), bicyclogermacrene (5.0%) and (E)-β-ocimene (4.6%). The volatile profile of H...

This study investigated the chemical composition and in-vitro cytotoxic activities of the essential oil isolated from the leaf of Beilschmiedia erythrophloia. The essential oil was isolated using hydrodistillation in a Clevenger-type apparatus, and characterized by GC-FID and GC-MS. Fifty-five compounds were identified, representing 100% of the oil. The main components identified were beta-cary...

The importance of olfactory learning in host plant selection is well demonstrated in insects, including the heliothine moths. In the present study olfactory conditioning of the proboscis extension response was performed to determine the moths' ability to learn and discriminate three plant odorants: beta-ocimene and beta-myrcene (activating the same receptor neurone type), and racemic linalool (...