Hydrogen abstraction reactions by the methyl radical from n-butanol have been investigated at the ROCBS-QB3 level of theory. Reaction energies and product geometries for the most stable conformer of n-butanol (ROH) have been computed, the reaction energies order α < γ < β < δ < OH. The preference for n-butane to favour H-abstraction at C(β) and C(γ) while, in contrast, n-butanol favours radical...

Electrochemical oxidation of four different alcohol molecules (methanol, ethanol, n-butanol and 2-butanol) at electrodeposited Pt film and carbon-supported Pt catalyst film electrodes, as well as the effect of mass transport on the oxidation reaction, has been studied systematically using the rotating disk electrode (RDE) technique. It was shown that oxidation current decreased with an increase...

In recent years, the interest in renewable fuels has increased mainly due to regulations regulating permissible limits of toxic components exhaust gases emitted by reciprocating engines. This paper presents results a comparison effects fueling compression-ignition piston engine with mixture diesel fuel and n-butanol, as well RME (Rapeseed Oil Methyl Esters) biodiesel n-butanol. The tests were c...

BACKGROUND Increasing energy costs and environmental concerns have motivated engineering microbes for the production of "second generation" biofuels that have better properties than ethanol. RESULTS AND CONCLUSION Saccharomyces cerevisiae was engineered with an n-butanol biosynthetic pathway, in which isozymes from a number of different organisms (S. cerevisiae, Escherichia coli, Clostridium ...

This study focused on the effects of n-butanol addition combustion characteristics n-heptane counterflow diffusion flame under pressures 1, 3, and 5 atm by a detailed kinetic simulation. The added volume fraction ranged from 0 to 50%. mass averaged velocity fuel streams was selected ensure momentum flux balance approximately constant for investigated flames. Flame structures mole profiles impac...

Abstract Binary blends of ethanol-diesel, n-butanol-diesel, ethanol-biodiesel, and n-butanol-biodiesel have been analyzed with terahertz time-domain spectroscopy in a full range concentrations at room temperature. The real imaginary parts the complex dielectric constant were obtained from spectra fitted to Debye model low volume (up 7.5% for ethanol diesel up 20% butanol diesel, biodiesel, biod...

Five flavonoid glycosides were isolated from the n-butanol soluble fraction of the ethanolic extract of Rapistrum rugosum and their structures were assigned from 1H- and 13C-NMR spectra (DEPT) with 2D NMR as quercetin-3-O-α-L-rhamnopyranoside (1), quercetin-3-O-β-D-xyloside (2), quercetin, 3-O-α-L-arabinopyranoside,7-O-α-L-rhamnopyranoside (3), kaempferol 3-O-α-L-arabinopyranoside, 7-O-α-L-rham...

BACKGROUND The current study was carried out to determine whether the aqueous-ethanolic extract or the butanolic fraction of Nigella sativa (NS) seeds could prevent or reduce calculi aggregation in experimental calcium oxalate nephrolithiasis in Wistar rats. MATERIALS AND METHODS Male Wistar rats were randomly divided into 5 groups: group A received tap drinking water for 28 days. Groups B, C...