GC-MS analysis identified forty seven and fourteen components in oils extracted using HD and in the volatile fractions extracted using HSE, respectively. eudesm-7(11) en-4-ol (28.46%), α-terpinyl acetate (12%), germacrene D-4-ol(7.3%), 1,8-cineole (6.22%), δ-cadinene (6.49%), bicyclogermacrene (5.20%) and α-cadinol (5.06%) were recorded as the main components of the essential oil and The major ...

In the present paper, we report the antimicrobial efficacy of three monoterpenes [linalyl acetate, (+)menthol, and thymol] against the gram-positive bacterium Staphylococcus aureus and the gram-negative bacterium Escherichia coli. For a better understanding of their mechanisms of action, the capability of these three monoterpenes to damage biomembranes was evaluated by monitoring the release, f...

Several lymphoma T cell lines differ in membrane superficial markers and do not respond to the same drugs and compounds. Tilia x viridis (Bayer) Simonk nothosubspecie moltkei (Dippel) Xifreda is a plant widely distributed in Argentina. The aim of this work was to study comparatively the effects of dichloromethane extract and isolated compounds on BW 5147 and on another T lymphoma cell line EL-4...

The chemical composition of the volatile oil from aerial parts of Hypericum triquetrifolium Turra was studied by GC-MS. Fifty components (97.1% of the total composition) were detected in the volatile oil. Germacrene-D (21.7%), β-caryophyllene (18.3%), δ-cadinene (6.4%), trans-β-farnesene (4.3%), α-humulene (3.8%), β-selinene (3.7%), γ-cadinene (3.3%) and trans-phytol (3.2%) were found to be the...

The metabolic cross-talk between the mevalonate (MVA) and the methylerythritol phosphate (MEP) pathways was analyzed in spike lavender (Lavandula latifolia Med) on the basis of 13CO₂-labelling experiments using wildtype and transgenic plants overexpressing the 3-hydroxy-3-methylglutaryl CoA reductase (HMGR), the first and key enzyme of the MVA pathway. The plants were labelled in the presence o...

This study focuses on the biological activities of eleven chitosan products with a viscosity-average molecular weight ranging from 22 to 846 kDa in combination with the most active monoterpenes (geraniol and thymol), out of 10 tested, against four plant pathogenic bacteria, Agrobacterium tumefaciens, Erwinia carotovora, Corynebacterium fascians, and Pseudomonas solanacearum. The antibacterial a...

background and objectives: essential oils are complex mixtures containing compounds of several different functional- group classes. depending on the structure, we can distinguish monoterpenes, phenylpropanes, and other components. here in this study two monoterpene compounds of essential oils, i.e. β-pinene and limonene were examined for their antiviral activity against herpes simplex virus typ...

francoeuria undulata (l.) lack is often synonymous with two species of the genus pulicaria,i.e. pulicaria undulata (l.) c.a. mey and pulicaria crispa (forssk.) olive, which are oftenincluded under the genus francoeuria. the essential oil yield and compositions in the fivenatural populations of francoeuria undulata from fars province in southern iran weredetermined by gc and gc/ms analysis. the ...

Isoprene and monoterpenes are important precursors of secondary organic aerosols (SOA) in continents. However, their contributions to aerosols over oceans are still inconclusive. Here we analyzed SOA tracers from isoprene and monoterpenes in aerosol samples collected over oceans during the Chinese Arctic and Antarctic Research Expeditions. Combined with literature reports elsewhere, we found th...

Previous studies and data presented here suggest that odors from healthy host Scotch pine (Pinus sylvestris) and nonhost Norway spruce (Picea abies), as well as major monoterpenes of these trees at natural release rates, significantly reduce the attraction of flying bark beetles, Pityogenes bidentatus, of both sexes to their aggregation pheromone components grandisol and cis-verbenol in the fie...