Results 21 to 30 of about 129,275 (339)

Solvent effects on Grubbs’ pre-catalyst initiation rates [PDF]

open access: yes, 2013
Initiation rates for Grubbs and Grubbs-Hoveyda second generation pre-catalysts have been measured accurately in a range of solvents. Solvatochromic fitting reveals different dependencies on key solvent parameters for the two pre-catalysts, consistent ...
Abboud   +33 more
core   +1 more source

Degradation Processes in Corona-Charged Electret Filter-Media [PDF]

open access: yesJournal of Engineered Fibers and Fabrics, 2007
The degradation of filtration performance for coronachargedelectret filter media exposed to ethyl benzenewas assessed. Nonwoven corona-charged polypropylenefiber mats were exposed to ethyl-benzene using acustom made apparatus.
Warren J. Jasper, Ph.D   +3 more
doaj  

Free radical 5-exo-dig cyclization as the key step in the synthesis of bis-butyrolactone natural products: experimental and theoretical studies [PDF]

open access: yes, 2011
Radical cyclization reactions were performed by 5-exo-dig mode to yield cis-fused bicyclic systems, leading to the synthesis of bis-butyrolactone class of natural products.
Allinger   +23 more
core   +1 more source

Assessment of the contribution of TEX air pollutants from Nigeria’s petroleum refineries to the ambient air quality: Part II

open access: yesCogent Engineering, 2021
Environmental hazards associated with release of emission from petroleum refineries have caused serious concerns for the host communities. The study focused on the assessment of the contribution of Nigerian refineries to the ambient air quality.
Ebenezer Leke Odekanle   +8 more
doaj   +1 more source

Determination of urban volatile organic compound emission ratios and comparison with an emissions database [PDF]

open access: yes, 2007
During the NEAQS-ITCT2k4 campaign in New England, anthropogenic VOCs and CO were measured downwind from New York City and Boston. The emission ratios of VOCs relative to CO and acetylene were calculated using a method in which the ratio of a VOC with ...
Atlas, EL   +14 more
core   +1 more source

OXIDATION OF OIL TAR IN THE PRESENCE OF THE ADDITIVE-INITIATOR

open access: yesИзвестия высших учебных заведений: Нефть и газ, 2016
The effect on the process of oxidation of the oil tar of initiating additive - ethyl benzene was studied. It is shown, that ethyl - benzene provides being oxidized petroleum product with additional active centers free radicals.
E. I. Grushova   +3 more
doaj   +1 more source

Analysis of gas chromatography/mass spectrometry data for catalytic lignin depolymerization using positive matrix factorization [PDF]

open access: yes, 2018
Various catalytic technologies are being developed to efficiently convert lignin into renewable chemicals. However, due to its complexity, catalytic lignin depolymerization often generates a wide and complex distribution of product compounds.
Barrett, JA   +7 more
core   +1 more source

Cancer Risk Assessment Benzene, Toluene, Ethylbenzene and Xylene (BTEX) in the Production of Insulation Bituminous [PDF]

open access: yesEnvironmental Energy and Economic Research, 2017
Benzene, Toluene, Ethyl Benzene and Xylene are volatile organic compounds (VOCs) with approximately similar physical and chemical characteristics.
Faezeh Borhani, Alireza Noorpoor
doaj   +1 more source

Crystal structures of 2-(benzenecarbothioyloxy)ethyl benzenecarbothioate and 2-(benzenecarbothioyloxy)ethyl benzoate [PDF]

open access: yesActa Crystallographica Section E Crystallographic Communications, 2017
The title compounds, C16H14O2S2and C16H14O3S, which are monomeric models (modelsDandE) for a polythionoester and a poly(ester-co-thionoester), respectively, crystallize in the space groupP21/cand are isostructural with each other. The molecule in each crystal is located on an inversion centre and has an all-transstructure. The asymmetric unit comprises
Syuto Tanaka, Hyuma Masu, Yuji Sasanuma
openaire   +3 more sources

2-Ethyl-3,5,6-triphenylpyrazine

open access: yesActa Crystallographica Section E, 2012
In the title molecule, C24H20N2, the pyrazine ring is significantly distorted from planarity, presumably due to steric crowding, and its conformation is well described as a flattened twist-boat. The benzene ring adjacent to the ethyl group forms dihedral
N. Anuradha   +4 more
doaj   +1 more source

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