نتایج جستجو برای: aromatic hydrocarbon

تعداد نتایج: 59271  

2009
Martin Haas Christian Leipski Rolf Chini

Context. This is the fourth in a series of papers based on the ISOCAM Parallel Survey at 6.7 μm. While the first three papers have been devoted to active galactic nuclei (AGN), here we report on emission-line galaxies without AGN signatures in their optical spectra. Aims. Polycyclic aromatic hydrocarbon (PAH) emission has been found in both starbursts and modestly starforming galaxies, but the ...

Journal: :Monthly Notices of the Royal Astronomical Society 2023

Abstract We examine the dependence of polycyclic aromatic hydrocarbon (PAH) band intensity ratios as a function average number carbon atoms and assess their effectiveness tracers for PAH size, utilising data, models, tools provided by NASA Ames Infrared Spectroscopic Database. To achieve this, we used spectra from mixtures PAHs different ionisation fractions, following size distribution. Our wo...

Journal: :Annual Review of Astronomy and Astrophysics 2008

Journal: :Chemical communications 2012
Haoran Sun Anjaneyulu Putta Justin P Kloster Usha K Tottempudi

The photostability of aromatic compounds in the presence of air is significantly improved through perfluoroalkylation of the corresponding aromatic cores and use of polyfluorinated solvents despite higher O(2) concentration in polyfluorinated solvents than in hydrocarbon solvents.

2009
B. T. Jobson R. Volkamer E. Velasco G. Allwine H. Westberg B. Lamb M. L. Alexander C. M. Berkowitz L. T. Molina

2014
Frederica P. Perera Hsin-wen Chang Deliang Tang Emily L. Roen Julie Herbstman Amy Margolis Tzu-Jung Huang Rachel L. Miller Shuang Wang Virginia Rauh

IMPORTANCE Polycyclic aromatic hydrocarbons are widespread urban air pollutants from combustion of fossil fuel and other organic material shown previously to be neurotoxic. OBJECTIVE In a prospective cohort study, we evaluated the relationship between Attention Deficit Hyperactivity Disorder behavior problems and prenatal polycyclic aromatic hydrocarbon exposure, adjusting for postnatal expos...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده مهندسی 1389

چکیده ندارد.

Journal: :desert 2009
h. akbarnia

the most usual type of petroleum mulch, which has been successfully used to combat desertification in large areain iran for more than thirty years, is produced by heavy residue petroleum cuts. the petroleum mulch consists of awide range of different heavy hydrocarbons such as polycyclic aromatic hydrocarbons (pahs). pahs are present atlow level in petroleum mulch, where there is contact with wa...

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