Formation of primary yields of hydroxyl radical and hydrated electron in the .gamma.-radiolysis of water

1973 ◽  
Vol 77 (6) ◽  
pp. 765-772 ◽  
Author(s):  
Z. D. Draganic ◽  
I. G. Draganic
Keyword(s):  
Hydroxyl Radical ◽  
Hydrated Electron ◽  
Gamma Radiolysis

Radiolysis studies on the corrosion inhibitors 1 -hexyn-3-ol, cinnamonitrile, and 1,3-diethyl-2-thiourea

1995 ◽  
Vol 73 (12) ◽  
pp. 2137-2142 ◽  
Author(s):  
A.J. Elliot ◽  
M.P. Chenier ◽  
D.C. Ouellette
Keyword(s):  
Hydrogen Atom ◽  
Hydroxyl Radical ◽  
Temperature Dependence ◽  
Rate Constant ◽  
Rate Constants ◽  
Corrosion Inhibitors ◽  
Hydrated Electron

In this publication we report: (i) the rate constants for reaction of the hydrated electron with 1-hexyn-3-ol ((8.6 ± 0.3) × 108 dm3 mol−1 s−1 at 18 °C), cinnamonitrile ((2.3 ± 0.2) × 1010 dm3 mol−1 s−1 at 20 °C), and 1,3-diethyl-2-thiourea ((3.5 ± 0.3) × 108 dm3 mol−1 s−1 at 22 °C). For cinnamonitrile and diethylthiourea, the temperature dependence up to 200 °C and 150 °C, respectively, is also reported; (ii) the rate constants for the reaction of the hydroxyl radical with 1-hexyn-3-ol ((5.5 ± 0.5) × 109 dm3 mol−1 s−1 at 20 °C), cinnamonitrile ((9.2 ± 0.3) × 109 dm3 mol−1 s−1 at 21 °C), and diethylthiourea ((8.0 ± 0.8) × 108 dm3 mol−1 s−1 at 22 °C). For cinnamonitrile, the temperature dependence up to 200 °C is also reported; (iii) the rate constant for the hydrogen atom reacting with 1-hexyn-3-ol ((4.3 ± 0.4) × 109 dm3 mol−1 s−1 at 20 °C). Keywords: radiolysis, corrosion inhibitors, rate constants.

scholarly journals Hydroxyl-radical-induced iron-catalysed degradation of 2-deoxyribose. Quantitative determination of malondialdehyde

1988 ◽  
Vol 252 (3) ◽  
pp. 649-653 ◽  
Author(s):  
K H Cheeseman ◽  
A Beavis ◽  
H Esterbauer
Keyword(s):  
Quantitative Determination ◽  
Hydroxyl Radical ◽  
Hydroxyl Radicals ◽  
Degradation Product ◽  
Thiobarbituric Acid ◽  
Iron Ions ◽  
Reactive Material ◽  
Gamma Radiolysis ◽  
Deoxyribose Degradation

The degradation of 2-deoxyribose to thiobarbituric acid-reactive material was investigated with two hydroxyl-radical-generating systems: (i) a defined gamma-radiolysis method and (ii) incubation with FeSO4 in phosphate buffer. In each case the thiobarbituric acid-reactive material can be accounted for by malondialdehyde, as measured by an h.p.l.c. method for free malondialdehyde. In the radiolysis system there is a large post-irradiation increase in free malondialdehyde if iron ions are added to the samples. It is proposed that this is due to iron ions catalysing the formation of hydroxyl radicals from radiolytically generated H2O2 as well as stimulating the breakdown of an intermediate deoxyribose degradation product. A mechanism for the formation of malondialdehyde during deoxyribose degradation is proposed.

g-Values for γ-irradiated water as a function of temperature

1990 ◽  
Vol 68 (5) ◽  
pp. 712-719 ◽  
Author(s):  
A. John Elliot ◽  
Monique P. Chenier ◽  
Denis C. Ouellette
Keyword(s):  
Experimental Data ◽  
Hydrogen Peroxide ◽  
Hydroxyl Radical ◽  
Temperature Dependence ◽  
Atomic Hydrogen ◽  
Molecular Hydrogen ◽  
Hydrated Electron ◽  
Temperature Range ◽  
Increasing Temperature

The g-values of primary species formed in the γ-radiolysis of water have been estimated for the temperature range 25–300 °C. The g-values for the hydrated electron, the hydroxyl radical, and molecular hydrogen all increase approximately 50% over this temperature range. The g-values for the minor products, hydrogen peroxide and atomic hydrogen, probably also increase with temperature; however, there is evidence from some of the experimental data which suggests that these g-values may slightly decrease with increasing temperature. Keywords: radiolysis, g-values, temperature dependence.

Gamma radiolysis of methyl t-butyl ether: a study of hydroxyl radical mediated reaction pathways

2002 ◽  
Vol 65 (4-5) ◽  
pp. 335-341 ◽  
Author(s):  
Taixing Wu ◽  
Vivian Cruz ◽  
Stephen Mezyk ◽  
William J. Cooper ◽  
Kevin E. O’Shea
Keyword(s):  
Hydroxyl Radical ◽  
Reaction Pathways ◽  
Butyl Ether ◽  
Gamma Radiolysis

scholarly journals Radical-Based Destruction of Nitramines in Water: Kinetics and Efficiencies of Hydroxyl Radical and Hydrated Electron Reactions

2012 ◽  
Vol 116 (31) ◽  
pp. 8185-8190 ◽  
Author(s):  
Stephen P. Mezyk ◽  
Behnaz Razavi ◽  
Katy L. Swancutt ◽  
Casandra R. Cox ◽  
James J. Kiddle
Keyword(s):  
Hydroxyl Radical ◽  
Hydrated Electron

Free Radical Chemistry of Disinfection-Byproducts. 1. Kinetics of Hydrated Electron and Hydroxyl Radical Reactions with Halonitromethanes in Water

2006 ◽  
Vol 110 (6) ◽  
pp. 2176-2180 ◽  
Author(s):  
Stephen P. Mezyk ◽  
Teresa Helgeson ◽  
S. Kirkham Cole ◽  
William J. Cooper ◽  
Robert V. Fox ◽  
...  
Keyword(s):  
Free Radical ◽  
Hydroxyl Radical ◽  
Disinfection Byproducts ◽  
Hydrated Electron ◽  
Radical Reactions ◽  
Radical Chemistry ◽  
Free Radical Chemistry ◽  
Kinetics Of
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