The views expressed in this document are solely those of the authors, and the EPA does not endorse any products or commercial services mentioned in this publication. This work has not been formally reviewed by the EPA. In this work we use molecular dynamics simulation techniques to directly investigate the interaction between isoprene and a model phospholipid membrane in.

The TC4 and ARCTAS campaigns were supported by NASA grants NNX07A元3G and NNX08AD29G. Isoprene was released as fireplace emissions at 38. Environmental Protection Agency STAR agreement RD-833749, and the Marsden Fund administrated by the Royal Society of New Zealand. Isoprene has been detected in 5 of 10 samples in the exhaust of turbojet engines at concentrations of 19.8, 18.1, 0.14, 0.20, and 0.05 ppm (4). Department of Energy grant DE-FG02-05ER63983, U.S. This work was supported by the Office of Science (Biological and Environmental Research), U.S. The numerical simulations for this research were performed on Caltech’s Division of Geological and Planetary Sciences Dell Cluster. Assembly and testing of the CIMS instrument was supported by the Davidow Discovery Fund. Isoprene is also thought to affect climate by acting as a source of atmospheric aerosols. Isoprenes contribute to flavors and fragrances of essential oils and other. In plants, it is elementary in the formation of isoprenoids, fat-soluble vitamins, carotenoids and related pigments. Expression of the kudzu isoprene synthase gene in Arabidopsis caused Arabidopsis to emit isoprene, indicating that whether or. The mass spectrometer used in this study was purchased as part of a major research instrumentation grant from the National Science Foundation (ATM-0619783). Isoprene, a five-carbon diene produced by plants, is the most abundant nonmethane hydrocarbon released into the atmosphere and plays an important role in tropospheric chemistry. Temperature (K) A B C Reference Comment 215.6 - 234.92: 4.08822: 1108.151-35.731: Osborn and Douslin, 1969: Coefficents calculated by NIST from author's data. Isoprene is an unsaturated pentahydrocarbon, Isoprene is found in certain plants or obtained by distillation of caoutchouc or gutta-percha. Strictly, terpenes are hydrocarbons, but the word is also nowadays used to describe derivatives. They contain multiples of 5 carbon atoms - 10, 15, 20 and so on.

thanks the EPA Science to Achieve Results (STAR) Fellowship Program (FP916334012) for providing partial support. Terpenes are naturally occurring compounds, derived from the 5-carbon alkene isoprene. was partially supported by the William and Sonya Davidow fellowship. Isoprene emission is thought to have a protective effect on plants. These molecules form aerosols that scatter sunlight the scattering is enhanced at short wavelengths, which is where the blue colour comes from. Jørgensen for helpful discussions regarding the quantum calculations. Isoprene is the building block of important natural molecules called terpenoids. Surratt for providing the speciation of the SOA resulting from BEPOX reactive uptake and J. A majority of these compounds are found only in plants, but some of the larger and more complex terpenes (e.g. Eddingsaas for experimental assistance J. Isoprene Rule Compounds classified as terpenes constitute what is arguably the largest and most diverse class of natural products. Jacob, principal investigator) for their help in setting up the GEOS-CHEM model A. Isoprene has a great impact on the chemistry of atmosphere through reaction with hydroxy radicals and nitrogen oxide leading to production of ozone or to increased life span of the greenhouse gas. Pye, and the Harvard GEOS CHEM team (Daniel J. Isoprene has a water solubility of 642 mg/l (25 C), a log Kow of 2.42, and a density of 0.681 g/cm3 (25 C). The isoprenoids are broadly classified according to the number of isoprene (C 5 H 8) units they contain, and they range in size from volatile oils of molecular formula C 10 H 16 to giant molecules such as that of natural rubber, which contains about 4,000 isoprene units.

Fox, Gaussian 09 Revision D.01, Wallingford, CT: Gaussian Inc. Isoprene is a liquid at 25 C with a reported melting point of 145.9 C, a boiling point of 34.0 C, and vapour pressure of 733.3 hPa (25 C).

Isoprene jmol