نتایج جستجو برای: methyl ethyl ketone

تعداد نتایج: 145323  

Journal: :Europan journal of science and technology 2022

In this study, ornamental cranberry (Cornus Alba) reinforced hybrid composite is synthesized. The plant leaves have been collected, dried, and ground for production. After it into unsaturated polyester (UP) at different rates by mass, mixed to show a homogeneous distribution. Then, 5 wt.% of the total mixture added epoxy resin polymerization reactions are started with help necessary additives c...

2014
Payam Ghiaci Joakim Norbeck Christer Larsson

2-Butanol and its chemical precursor butanone (methyl ethyl ketone--MEK) are chemicals with potential uses as biofuels and biocommodity chemicals. In order to produce 2-butanol, we have demonstrated the utility of using a TEV-protease based expression system to achieve equimolar expression of the individual subunits of the two protein complexes involved in the B12-dependent dehydratase step (fr...

2008
Daniel Weber Michael D. Mantle Andrew J. Sederman Lynn F. Gladden

In this work we report the application of a recently developed experimental protocol using Pulsed Field Gradient (PFG) Nuclear Magnetic Resonance (NMR) techniques to simultaneously assess bulk pore and surface diffusion coefficients in liquid saturated porous catalysts. This method has been developed to study solvent effects on the diffusion of methyl ethyl ketone (MEK) in mesoporous 1 wt% Pd/A...

Journal: :Nihon eiseigaku zasshi. Japanese journal of hygiene 1986
M Ando

In vivo, an organic peroxide, methyl ethyl ketone peroxide (MEKP) damaged microsomal cytochrome P-450 and cytochrome P-450 peroxidase in vitamin E deficient rat livers. Dietary vitamin E protected the microsomal enzymes from MEKP damage. Phenobarbital induced liver cytochrome P-450 peroxidase and glutation S-transferase and decreased MEKP damage on microsomal enzymes. MEKP induced production of...

Journal: :Molecules 2011
Yan Gong Lu Lin

The oxidative decarboxylation of levulinic acid (LA) by silver(I)/persulfate [Ag(I)/S₂O₈²⁻] has been investigated in this paper. The effects of buffer solution, initial pH value, time and temperature and dosages of Ag(I)/S₂O₈²⁻ on the decarboxylation of LA were examined in batch experiments and a reaction scheme was proposed on basis of the reaction process. The experimental results showed that...

Journal: :research in pharmaceutical sciences 0
abbasali palizban lotfollah saghaie

the complex-forming ability of 2-methyl-3-hydroxypyran-4-one ( 1a ), 2-ethyl-3-hydroxypyran-4-one ( 1b ), 1,2-dimethyl-3-hydroxypyridin-4-one ( 4a ) and 1-ethyl-2-methyl-3-hydroxypyridin-4-one ( 4b ) with nickel(ni(ii)) were characterized by infrared, ultraviolet, proton nuclear magnetic resonance spectroscopy and melting point. the mole-ratio of nickel:ligands was analyzed by atomic-absorption...

Journal: :Biofuels, Bioproducts and Biorefining 2023

The synthesis of sugar fatty acid esters (SFAEs) from lignocellulosic biomass and oleic (C18:1) was catalyzed by immobilized-stabilized derivatives Candida antarctica lipase B in a methyl ethyl ketone medium. After steam-explosion pretreatment mixed hardwoods enzymatic hydrolysis at 15%wt solids, xylose glucose were purified/concentrated to mass ratio ~3 1. These sugars superior commercial as t...

Journal: :journal of sciences islamic republic of iran 0

reaction of substituted-aniline (8) with ethyl (l-methyl-5-nitroimidazole-2- carbonyl) acetate (9) gave 4-hydroxy-2-(l-methyl-5-nitro-2-imidazolyl)- substituted-quinolines (lo), which were converted to compound 11 with phosphorus oxychloride. substituted-2-(l-methyl-5-nitro-2-imidazo1yl)-4.- methyl-(or phenyl-) quinolines (14) were prepared through the reaction of 2- acetyl-5-nitro-1-methyl-imi...

Journal: :Atmospheric Chemistry and Physics 2021

Abstract. Organosulfates (OSs) are important constituents of secondary organic aerosols, but their hygroscopic properties and cloud condensation nucleation (CCN) activities have not been well understood. In this work we employed three complementary techniques to characterize interactions several OSs with water vapor under sub- supersaturated conditions. A sorption analyzer was used measure mass...

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