Results 71 to 80 of about 68,150 (262)

Polyphenylene ethers with imide linking groups [PDF]

open access: yes, 1984
Novel polyphenylene ethers with imide linking units are disclosed. These polymers incorporate the solvent and thermal resistance of polyimides and the processability of polyphenylene ethers.
Burks, H. D., St.clair, T. L.
core   +1 more source

Diversity oriented synthesis : substitution at C5 in unreactive pyrimidines by Claisen rearrangement and reactivity in nucleophilic substitution at C2 and C4 in pteridines and pyrido[2,3-d]pyrimidines [PDF]

open access: yes, 2011
Diversity oriented synthesis of fused pyrimidines leads to scaffolds with many biological activities. In the case of the preparation of pyrido[2,3-d]pyrimidines from 2-alkylthiopyrimidines, the formation of a new carbon-carbon bond at C5 is required, a ...
Adcock, Jonathan Paul   +3 more
core   +1 more source

Semiheterogeneous Dual Nickel/Photocatalytic (Thio)etherification Using Carbon Nitrides [PDF]

open access: yes, 2019
A carbon nitride material can be combined with homogeneous nickel catalysts for light-mediated cross-couplings of aryl bromides with alcohols under mild conditions.
Cavedon, Cristian   +3 more
core   +1 more source

Hydrocarbon molar water solubility predicts NMDA vs. GABAA receptor modulation. [PDF]

open access: yes, 2014
BackgroundMany anesthetics modulate 3-transmembrane (such as NMDA) and 4-transmembrane (such as GABAA) receptors. Clinical and experimental anesthetics exhibiting receptor family specificity often have low water solubility. We hypothesized that the molar
Brosnan, Robert J, Pham, Trung L
core   +2 more sources

Binary solvent participation in crystals of a multi-aromatic 1,2,3-triazole

open access: yesActa Crystallographica Section E: Crystallographic Communications
The X-ray crystal structure of a multi-aromatic substituted 1,2,3-triazole is presented, which shows an extensive three-dimensional hydrogen-bonding network involving two water molecules and two acetonitrile molecules. The structure of 4-{[(4-{[1-({[(3,4-
Jonathan Filley
doaj   +1 more source

Koordinationschemie -gebundener Cyclopentadienyl-Chalkogeno-Ether [PDF]

open access: yes, 1990
Coordination Chemistry of rr-Bonded Cyclopentadienyl Chalcogeno Ethers, I. - Chelate Complexes of Pentakis(methylthio)cymantrene with Metal Carbonyls [C5(SMe)5]Mn(CO)3 (1) reacts with W(CO)5(THF), Mo(CO)4(C7H8), Cr(CO)3(NCMe)3, and Re(CO)4(-C3H5)/HBF4 ...
Abel   +27 more
core   +1 more source

High-performance liquid chromatographic separation of surface flavonoid aglycones in Artemisia annua L. and Artemisia vulgaris L. [PDF]

open access: yesJournal of the Serbian Chemical Society, 2004
External flavonoid aglycones from Artemisia annua L. and Artemisia vulgaris L. were analyzed by the HPLC method. The mobile phase was composed of t-butanol-methanol-20 mmol l-1 phosphate buffer, pH 3.22.
STEPHANKA IVANCHEVA   +2 more
doaj  

Rendimento térmico e emissões de contaminantes atmosféricos de gasolinas formuladas com etanol, MBTE e TAEE Thermal yield and emission of atmospheric contaminants from gasolines formulated with ethanol, MTBE and TAEE

open access: yesQuímica Nova, 2008
The specific consumption and carbon monoxide (CO) and nitrogen oxide (NO) emissions from gasolines formulated with ethanol, methyl tert-butyl ether (MTBE) and tert-amyl ethyl ether (TAEE) were evaluated in the rich, stoichiometric and lean-burn regions ...
Rosângela da Silva   +2 more
doaj   +1 more source

Reaction of Furfuryl Alcohol, Furfuryl Methyl Ether and 2,5-Dimethoxy-2,5-dihydrosilvan with Methanolic Hydrogen Chloride. [PDF]

open access: bronze, 1955
Niels Clauson-Kaas   +3 more
openalex   +1 more source

Rate constants and Arrhenius parameters for the reactions of OH radicals and Cl atoms with CF3CH2OCHF2, CF3CHClOCHF2 and CF3CH2OCClF2, using the discharge-flow/resonance fluorescence method [PDF]

open access: yes, 2001
Rate constants have been determined for the reactions of OH radicals and Cl atoms with the three partially halogenated methyl-ethyl ethers, CF\(_3\)CH\(_2\)OCHF\(_2\), CF\(_3\)CHClOCHF\(_2\) and CF\(_3\)CH\(_2\)OCClF\(_2\), using discharge-flow ...
Beach, S. D.   +3 more
core   +1 more source

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