Proton transfer reaction mass spectrometry (PTR-MS) is a well-established technique for real-time analysis of volatile organic compounds (VOCs). Although it is extremely sensitive (with sensitivities of up to 4500 cps/ppbv, limits of detection <1 pptv and the response times of approximately 100 ms), the selectivity of PTR-MS is still somewhat limited, as isomers cannot be separated. Recently, s...

Terpenoids, naturally occurring compounds derived from isoprene units present in pine oleoresin, are a valuable source of chemicals used in solvents, fragrances, flavors, and have shown potential use as a biofuel. This paper describes a method to extract and analyze the terpenoids present in loblolly pine saplings and pine lighter wood. Various extraction solvents were tested over different tim...

*Correspondence: Emmanuelle Jacquin-Joly, Institut National de la Recherche Agronomique, UMR iEES-Paris, route de Saint Cyr, 78026 Versailles Cedex, France e-mail: emmanuelle.jacquin@ versailles.inra.fr; Frédéric Marion-Poll, LEGS UPR 9034, CNRS, avenue de la Terrasse, 91198 Gif-sur-Yvette, France e-mail: frederic.marion-poll@ agroparistech.fr †Present address: Kacem Rharrabe, Laboratoire Polyd...

The 1H NMR spectra of a number of alkenes of known geometry were recorded in CDCl3 solution and assigned, namely ethylene, propene, 4-methylcyclohexene, 1,4-dimethylcyclohexene, methylene cyclohexane (in CFCl3 –CD2Cl2 at 153 K), 5-methylene-2-norbornene, camphene, bicyclopentadiene, styrene and 9-vinylanthracene. These results together with literature data for other alkenes, i.e. 1,3and 1,4-cyc...

Pine resin has been used as a traditional health-promoting medicinal food in Turkey and some countries for centuries. In the present study, antioxidant potential monoterpene profile of 13 pine samples purchased from herbalists different provinces were investigated. According to analysis results, there differences between samples, especially terms color properties. The experimental results demon...

This study aims to evaluate the benefits of some herbs such as antioxidant, antibacterial, and anti-cancer activities Lemongrass (Cymbopogon citratus), peppermint (Mentha longifolia), wormwood (Artemisia absinthium) essential oils (EOs). The chemical composition was identified using GC-MS technique. total phenolic content antioxidant were monitored by radical scavenging assay (DPPH). Furthermor...

Isoprene and monoterpenes emission fluxes emitted by Quercus robur seedlings were measured at a leaf scale in the field. Isoprene emissions were always predominant over the monoterpene ones, alpha-pinene, beta-pinene and camphene being the most abundant emitted monoterpenes. Emission fluxes were normalised at standard conditions of temperature and photosynthetically active radiation, PAR, (30 d...

Achillea millefolium belong to the asteraceae family and from genus achillea. In this study essential oils were extracted from all aerial parts via hydro distillation (HD) method by clevenger set . By using of gas chromatography/mass spectrometry ( GC-MS) technique the chemicals component essential oil were identified. About 41 components with were identified which encompassed 97.66 percent of ...