Results 21 to 30 of about 319,868 (397)

Acetylation of Raw Cotton for Oil Spill Cleanup Application: an FTIR and 13-C MAS NMR Spectroscopic Investigation [PDF]

open access: yes, 2004
Fourier transform infrared (FTIR) and 13C MAS NMR spectroscopy have been used to investigate the acetylation of raw cotton samples with acetic anhydride without solvents in the presence of different amounts of 4-dimethylaminopyridine (DMAP) catalyst ...
Adebajo, Moses, Frost, Raymond
core   +2 more sources

Synthesis of a New Series of Pyridine and Fused Pyridine Derivatives

open access: yesMolecules, 2012
The reaction of 4-methyl-2-phenyl-1,2-dihydro-6-oxo-5-pyridine- carbonitrile (1) with arylidene malononitrile afforded isoquinoline derivatives 2a,b.
Siham AbdulRahman Al-Issa
doaj   +1 more source

Synthesis Of L-Menthyl Acetic by Esterification L-Menthol and Acetic Anhydride with Variation Of Time

open access: yesAl-Kimia, 2020
l-menthyl acetic is an ester with specific aroma that synthesized by reaction of l-menthol and acetic anhydride and useful in fragrance industry. This paper reports influenced variation of time reaction toward ester product and characteristics l- menthyl
Novia Suryani   +3 more
doaj   +1 more source

Comparison of alternative methods for methyl acetate + methanol + acetic acid + acetic anhydride mixture separation

open access: yesТонкие химические технологии, 2019
Objectives. The paper is a comparative analysis of methyl acetate + methanol + acetic acid + acetic anhydride industrial mixture separation flowsheets based on the use of special distillation methods (extractive distillation and pressure-swing ...
A. V. Frolkova   +3 more
doaj   +1 more source

Comparison of six derivatizing agents for the determination of nine synthetic cathinones using gas chromatography-mass spectrometry [PDF]

open access: yes, 2017
Six acylation reagents have been compared for their derivatisation potential towards nine synthetic cathinones by gas chromatography-mass spectrometry (GC-MS).
Alsenedi, Khalid A., Morrison, Calum
core   +1 more source

Nitration of phenanthrene in acetic anhydride [PDF]

open access: yesAustralian Journal of Chemistry, 1978
Nitration of phenanthrene in acetic anhydride gives 10-acetoxy-10'-nitro-9,9',10,10'-tetrahydro-9,9'-biphenanthryl as major product.
A. Fischer   +3 more
openaire   +3 more sources

Utilization of multiple graphene layers in fuel cells. 1. An improved technique for the exfoliation of graphene-based nanosheets from graphite [PDF]

open access: yes, 2010
An improved, safer and mild method was proposed for the exfoliation of graphene like sheets from graphite to be used in fuel cells. The major aim in the proposed method is to reduce the number of layers in the graphite material and to produce large ...
Okyay, Firuze   +3 more
core   +1 more source

N-Methylimidazole Promotes The Reaction Of Homophthalic Anhydride With Imines [PDF]

open access: yes, 2014
The addition of N-methylimidazole (NMI) to the reaction of homophthalic anhydride with imines such as pyridine-3-carboxaldehyde-N-trifluoroethylimine (9) reduces the amount of elimination byproduct and improves the yield of the formal cycloadduct ...
Aaron Levin   +25 more
core   +6 more sources

Effect of fibre treatments on interfacial shear strength of hemp fibre reinforced polylactide and unsaturated polyester composites [PDF]

open access: yes, 2011
Surface treatment of hemp fibres was investigated as a means of improving interfacial shear strength (IFSS) of hemp fibre reinforced polylactide (PLA) and unsaturated polyester (UPE) composites. Fibres were treated with sodium hydroxide, acetic anhydride,
Fernyhough, Alan   +2 more
core   +2 more sources

Chemistry of pyrrolizines; reactions with cyanogen bromide and trifluoroacetic anhydride [PDF]

open access: yes, 1982
Interaction of the pyrrolizine 3 with cyanogen bromide in a tetrahydrofuran/water mixture affords addition to the enamine double bond with formation of 5 which can be aromatized to 6 by silica gel.
Reinhoudt, D.N.   +2 more
core   +3 more sources

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