In this research, the radiation-heterogeneous processes of water decomposition on surface zirconium dioxide nanoparticles (n-ZrO2) were studied. The kinetics buildup molecular hydrogen during radiolytic was also examined. production H2 and H2O2 through radiolysis investigated to develop a computational model disclose kinetic behavior radiolysis. enthalpy ZrO2 studied at temperature range T=1200...

Using pulse radiolysis and competition kinetics with cytochrome c, the reaction of superoxide with horse spleen ferritin was investigated. The second-order rate constant is estimated to be 2 +/- 1 x 10(6) dm3 mol-1 s-1.

Amino acids in Solar System bodies may have played a key role in the chemistry that led to the origin of life on Earth. We present laboratory studies testing the stability of amino acids against γ radiation photolysis. All the 20 chiral amino acids in the levo form used in the proteins of the current terrestrial biochemistry have been irradiated in the solid state with γ radiation to a dose of ...

Amino acids in solar system bodies may have played a key role in the chemistry that led to the origin of life on Earth. We present laboratory studies testing the stability of amino acids against γ radiation photolysis. All the 20 chiral amino acids in the levo form used in the proteins of the current terrestrial biochemistry have been irradiated in the solid state with γ radiation to a dose of ...

A femtosecond electron bunch is essential for the observation of ultrafast phenomena. In order to improve the time resolution of pulse radiolysis and ultrafast electron diffraction (UED), that involve the use of an ultrashort electron bunch and ultrashort light, a femtosecond photocathode RF gun was investigated experimentally. The bunch length due to space-charge and RF effects in the gun was ...

Pulse Radiolysis, OH Radicals, Acetylacetone, Reaction Mechanisms Pulse radiolysis experiments monitoring optical absorbance as well as conductivity and in-situ ESR radiolysis studies show that the OH radical reacts with the enol (k = 8.6 x 109 M_1 s_1) and the enolate (k = 7.4 X 109 M_1 s-1) forms of acetylacetone by addition to the C = C double bond in aqueous N2O saturated solution. The OH r...

Cytosine, G-Values, pK-Values, Absorption Spectra, Pulse Radiolysis Using the pulse radiolysis technique the OH adducts of cytosine, 5-methyl cytosine and 2'-deoxycytidine were investigated in alkaline N20 saturated aqueous solutions. Absorption spectra were recorded and their change with time was correlated with the change in conductivity. An OH induced reaction (1.4 • 108 1 • mol-1 • s -1) wa...