搜索结果: 1-11 共查到“理学 n-alkanes”相关记录11条 . 查询时间(0.093 秒)
δD values of individual n-alkanes in sediments from the Chaka salt lake (China) and terrestrial plants from the surrounding area
Chaka salt lake sediment plant n-alkane hydrogen isotope biological source
2017/4/11
Molecular distribution and compound-specific hydrogen isotopic ratios (δD) of n-alkanes in shallow-water surface
sediments from the Chaka salt lake and from various terrestrial plants in the surround...
Distribution and isotopic composition of n-alkanes from grass, reed and tree leaves along a latitudinal gradient in China
plant n-alkanes carbon isotopes hydrogen isotopes China
2017/4/12
Molecular composition and compound-specific carbon and hydrogen stable isotope ratios of n-alkanes are presented
for leaves of grass, reeds and trees from five regions extending between latitudes 22°...
Compound-specific stable carbon and hydrogen isotopic compositions of n-alkanes in urban atmospheric aerosols from Tokyo
δD, δ13C, n-alkane urban aerosols Tokyo
2017/8/9
Stable carbon (δ13C) and hydrogen (δD) isotopic compositions of n-alkanes in total suspended particles from Tokyo were measured to decipher their source and transport in the polluted urban atmosphere....
Observed and simulated global distribution and budget of atmospheric C2-C5 alkanes
global distribution atmospheric C2-C5 alkanes
2010/8/12
The primary sources and atmospheric chemistry of C2-C5 alkanes were incorporated into the atmospheric chemistry general circulation model EMAC. Model output is compared with new observations from the ...
Size-distributions of n-alkanes, PAHs and hopanes and their sources in the urban, mountain and marine atmospheres over East Asia
n-alkanes PAHs hopanes marine atmospheres East Asia
2009/12/3
Size-segregated (9 stages) n-alkanes, polycyclic aromatic hydrocarbons (PAHs) and hopanes in the urban (Baoji city in inland China), mountain (Mt. Tai in east coastal China) and marine (Okinawa Island...
Kinetics of the gas-phase reactions of OH radicals with alkanes and cycloalkanes
Kinetics gas-phase reactions OH radicals alkanes cycloalkanes
2009/3/11
The available database concerning rate constants for gas-phase reactions of the hydroxyl (OH) radical with alkanes through early 2003 is presented over the entire temperature range for which measureme...
Hydrogen isotope ratios of terrigenous n-alkanes in lacustrine surface sediment of the Tibetan Plateau record the precipitation signal
n-alkanes lacustrine sediment terrestrial origin hydrogen isotope ratio precipitation climate
2017/8/10
Hydrogen isotope ratios were measured on terrigenous alkanes (n-C25 to n-C31) extracted from recent lake surface sediments from the climatically and environmentally distinct basins Qiangyong Glacier L...
Activation of Light Alkanes on Pure and Fe and Al Doped Silica Clusters: A Density Functional and ONIOM Study
C-H bond activation methane ethane, silica Fe doping Al doping density functional DFT ONIOM
2010/4/16
C-H bond activation was studied by use of density functional theory (DFT) and ONIOM calculations as implemented in Gaussian 2003 at the B3LYP level utilising 6-31G* as the basis set for Si, Al, and Fe...
Vapour Liquid Equilibrium in Asymmetric Mixtures of n-Alkanes with Ethane
Vapour liquid equilibrium Interaction parameters Asymmetric mixtures
2010/4/22
The paper presents a vapour liquid equilibria study in binary mixtures of n-alkanes with high dimensional asymmetry. Each mixture contains ethane and alkanes higher than eicosane. Calculations were do...
Reactions of Clay Volatiles with n-Alkanes
Alkane Catalysis Clay volatiles Gas chromatography Halloysite Kaolinite Mass spectrometry Montmorillonite Sepiolite
2012/1/6
Volatiles formed on heating clay minerals contain a variety of cations and anions and are highly reactive. Gas chromatograph-mass spectrometer analysis of long-chain n-alkanes exposed to such volatile...
Use of Long-Spacing Alcohols and Alkanes for Calibration of Long Spacings from Layer Silicates, Particularly Clay Minerals
Long-Spacing Alcohols Alkanes Calibration Long Spacings Layer Silicates Particularly Clay Minerals
2012/2/15
Lattice spacings of layer silicates, particularly clay minerals, may exceed 20 Å. The errors in measuring lattice spacings increase rapidly for spacings greater than about 10 Å and diffrac...