Composition of the essential oil from the flowers of Solandra maxima (Sessé & Moc.) P.S. Green

Abstract

Dried flowers from Solandra maxima were hydrodistilled yielding 0.3% of essential oil; the yield could be slightly increased when the flowers were subjected to enzymatic hydrolysis using β‐glucosidase prior to hydrodistillation. The two samples were subjected to a comparative investigation by gas chromatography with flame ionization detection and gas chromatography–mass spectrometry. About 70 compounds were identified in both samples, representing more than 95% of the total. The main constituents were linalool (12.4% and 17.9%), methyl salicylate (9.1% and 11.4%), safranal (3.8% and 5.7%), α‐terpineol (2.0% and 4.5%), geraniol (2.6% and 3.6%), carvacrol (17.8% and 11.5%), (E)‐nerolidol (3.4% and 4.3%) and benzyl salicylate (11.1% and 7.1%). Alcohols, phenols and esters were the major classes, the concentration of alcohols being distinctly higher in the sample obtained after enzymatic hydrolysis. Copyright © 2013 John Wiley & Sons, Ltd.

Effect of cosmetic matrices on the release and odour profiles of the supercriticalCO2extract ofOriganum majoranaL.

“…The oven temperature programme was initially set at 50°C for 5 min, then raised up to 200°C at a rate of 2°C min −1 , and finally held isothermal for 20 min. Quantification of volatiles was obtained by GC‐FID peak‐area normalization with the use of response factors . Due to the complexity of the SFE‐CO 2 extracts, the response factors were calculated for the main classes of volatiles (oxygen‐containing monoterpenes and hydrocarbons).…”

“…Due to the complexity of the SFE‐CO 2 extracts, the response factors were calculated for the main classes of volatiles (oxygen‐containing monoterpenes and hydrocarbons). Compounds belonging to these classes were assumed to have the same response factor . The standard components were injected at different concentrations (0.02–0.15 mg mL −1 ) using benzyl acetate as internal standard at a concentration of 0.02 mg mL −1 .…”

Foliar treatments with Gaultheria procumbens essential oil induce defense responses and resistance against a fungal pathogen in Arabidopsis

“…To conclude, we show here that the essential oil from G. procumbens could be a valuable natural source of MeSA for biocontrol applications. MeSA has been detected in the composition of essential oils from various sources (Flamini et al, 2002 ; Nebie et al, 2004 ; Paudel et al, 2013 ; Radoias and Bosilcov, 2013 ) but in lower proportion than in GEO and associated with other metabolites which can display toxic effects from the plants or environmental organisms. However, additional assays are required to evaluate the activity of GEO in the field since activity of natural compounds can be challenged by environmental conditions and responses to abiotic stresses (Walters and Heil, 2007 ).…”