The essential oil from the dried leaves of Chromolaena odorata (L.) R.M. King & H. Rob. was obtained by hydrodistillation and analyzed by gas chromatography-mass spectrometry (GC-MS). The major components were α-pinene (42.2%), β-pinene (10.6%), germacrene D (9.7%), β-copaen-4α-ol (9.4%), (E)caryophyllene (5.4%), and geijerene/pregeijerene (7.5%). The oil was screened for antimicrobial activity...

US/German Workshop Riverside 1999 L. Ruppert 1 Influence of Biogenic VOCs on Photooxidant Formation: Simulation Experiments in EUPHORE and Comparison with Model Calculations L. Ruppert Fraunhofer Institut Atmosphärische Umweltforschung, IFU Kreuzeckbahnstr. 19, D-82467 Garmisch-Partenkirchen, e-mail: [email protected] Introduction The possible contribution of biogenic VOCs to tropospheric ozon...

The essential oils of the flowers, leaves and stems of Senecio polyanthemoides Sch. Bip. Samples collected from two different localities within the city of uMhlathuze, KwaZulu-Natal Province (South Africa) were isolated by hydrodistillation and analyzed using GC and GC/MS. Twenty-six constituents were identified, representing an average of 86.0 - 99.6% of the total oil composition. The chemical...

Pinenes and pinene dimers have similar energy densities to petroleum-based fuels are regarded as alternative fuels. The pyrolysis of the pinenes is well studied, but information on their combustion kinetics limited. Three stoichiometric, flat premixed flames C10H16 monoterpenes ?-pinene, ?-pinene, myrcene were investigated by synchrotron-based photoionization molecular-beam mass spectrometry (P...

In the production process of briquette biofuel, terpenes such as pinene and camphene, well non-terpenoid VOCs formic acid, acetaldehyde, benzene, are generated during conditioning, drying other procedures. Different catalysts Fe 3 O 4 supported by CoFe-ZIFs were prepared thermal dissolution method microwave with changing doping amount iron. The structures these characterized X-ray Diffraction (...

Pinus cembra, stone pine, is an Alpine coniferous tree rich in aromatic compounds. Twigs with needles are used commonly to produce essential oils for various purposes pharmacy, food industry, and cosmetics. Hydrolates as byproducts of hydrodistillation encounter increasing interest owing their properties. The variabilities the compositions oil related hydrolates studied samples from individual ...

objective(s):astrodaucus persicus, apiaceae, is used as vegetable or food additive in some parts of iran. the essential oils of different parts of astrodaucus persicus from kordestan province were analyzed for the first time and compared with other regions. in this study, antioxidant activities and total phenols determination of aerial parts essential oils and root fractions of a. persicus were...

† These authors contributed equally 9 10 Abstract. To obtain more and accurate biogenic volatile organic compound (BVOC) emission rates 11 for more plant species in China and further improve the accuracy of emission rates used in BVOC 12 emission inventories, we conducted field measurements and developed a statistical approach for 13 estimating representative emission rates. We performed field ...

Artemisia annua plants produce a broad range of volatile compounds, including monoterpenes, which contribute to the characteristic fragrance of this medicinal species. A cDNA clone, QH6, contained an open reading frame encoding a 582-amino acid protein that showed high sequence identity to plant monoterpene synthases. The prokaryotically expressed QH6 fusion protein converted geranyl diphosphat...