This study presents a modeling framework based on laboratory data to describe the kinetics of glyoxal reactions that form secondary organic aerosol (SOA) in aqueous aerosol particles. Recent laboratory results on glyoxal reactions are reviewed and a consistent set of empirical reaction rate constants is derived that captures the kinetics of glyoxal hydration and subsequent reversible and irreve...

The products of the primary OH-initiated oxidation of toluene were investigated using the turbulent flow chemical ionization mass spectrometry technique at temperatures ranging from 228 to 298 K. A major dienedial-producing pathway was detected for the first time for toluene oxidation, and glyoxal and methylglyoxal were found to be minor primary oxidation products. The results suggest that seco...

It was found by Kisch (1) that methylglyoxal inhibits tissue respiration in vitro. The mechanism of this inhibition is the combination of methylglyoxal with enzyme proteins, requiring -SH groups for their catalytic activity (2). As a continuation of these experiments, the specificity of the widely distributed glyoxalase-glutathione (GSH) system was tested with both methylglyoxal and glyoxal. Th...

cDNA of the glx1 gene encoding glyoxal oxidase (GLX) from Phanerochaete chrysosporium was isolated and expressed in Pichia pastoris. The recombinant GLX (rGLX) produces H(2)O(2) over 7.0 nmol/min/mL using methyl glyoxal as a substrate. Use of rGLX as a generator of H(2)O(2) improved the coupled reaction with recombinant manganese peroxidase resulting in decolorization of malachite green up to 1...

The condensation of benzylamine with glyoxal leads to Hexabenzylhexaazaisowurtzitane (HBIW) in acetonitrile solvent with citric acid as a green catalyst under both conventional stirring and ultrasonic irradiation conditions. The influence of four variables, including the amount of catalyst, solvent, reaction time and ultrasonic power, on the reaction yield was investigated. The results showed t...

Fluorescence excitation spectra for transition à Au – X̃ Ag of trans-glyoxal in a supersonic jet were recorded with laser excitation in a wavelength region near 395 nm. With resolution 0.04 cm, most lines in these spectra are resolved and are assigned rotationally; of six bands assigned, three have c-type rotational structure, and another three have types a/b hybrid, a and b . Fluorescence decay...