The influence of the concentration of sodium, lithium, caesium, and potassium ions as well as of the ionic strength of the solutions used on the dismutation rate of ascorbyl radicals has been investigated. While the dismutation rate was not influenced by Li+, it decreased, however, with increasing concentrations of the other ions investigated. The largest effect was obtained with Na+. This chan...

The recent assertion of J. Diguiseppi and I. Fridovich (1980, Arch. Biochem. Biophgs. 203,145-150) that Fe-EDTA does not catalyze superoxide dismutation is disputed. By directly observing superoxide generated during pulse radiolysis, we have confirmed the results of a previous study (G. J. McClune, J. A. Fee, G. A. McClusky, and J. T. Groves, 1977, J. Amer. Chem. Sot 99, 5220-5222) which conclu...

Currently, the most common method of silane synthesis for electronics and photovoltaics is trichlorosilane (TS) dismutation. TS dismutation proceeds in form a reactions cascade, therefore its study both practical scientific interest. The results calculating equilibrium composition reaction mixture vapor phase based on literature data from various sources were not reliable. Therefore, dependence...

Previously it has been shown that Furacin (5-nitro-2-furaldehyde semicarbazone) inhibited the dismutation of pyruvate by whole resting cells of Micrococcus pyogenes var. aureus (1). Other earlier studies have also shown that both pyruvate dismutation and the formation of acetylmethylcarbinol (AMC) by cell-free extracts of pigeon breast muscle were markedly inhibited by Furacin (2). We are repor...

We have previously shown that the phosphorylation of vitamin B1 to cocarboxylase by an atiozymase preparation is dependent upon the presence of hexosediphosphate and certain heat-stable factors contained in boiled tissue extracts (1). Our results further indicated that this phosphorylation was completely inhibited by 0.0025 to 0.005 M sodium iodoacetate, and that the addition of 0.04 M sodium f...

The present study has investigated the synthesis of copper nanoparticles via copper dismutation reaction in an aqueous solution and ambient conditions. Copper (II) chloride hydrate ( ), sodium oleate (SO), sodium chloride (NaCl) and ethylene diamine (EN) have been used as copper (I, II) ions source, surfactant, chloride ions supplier and ligand, respectively. Also, an amount of hydrochloric aci...

Dismutation of superoxide has been shown previously to be catalyzed by stable nitroxide compounds. In the present study, the mechanism of superoxide (.O2-) dismutation by various five-membered ring and six-membered ring nitroxides was studied by electron paramagnetic resonance spectrometry, UV-visible spectrophotometry, cyclic voltammetry, and bulk electrolysis. Electron paramagnetic resonance ...