Journal ArticleDOI
Re-evaluation of the thiocyanate dosimeter for pulse radiolysis
George V. Buxton,Craig R. Stuart +1 more
TLDR
In this article, the super-Fricke dosimeter was used as a secondary standard for the thiocyanate dosimeter in O2-saturated water and the results were improved to 3.47 ± 0.06.Abstract:
The thiocyanate dosimeter (10–2 mol dm–3 SCN– in O2-saturated water) has been standardised against the super-Fricke dosimeter (10–2 mol dm–3 FeII in O2-saturated 0.4 mol dm–3 H2SO4) using the hexacyanoferrate(II) dosimeter [5 × 10–3 mol dm–3 Fe(CN)64– in O2-saturated water] as a secondary standard. On the basis that G(FeIII)= 1.67 × 10–6 mol J–1 and IµFeIII= 220.4 m2 mol–1 at 304 nm and 25 °C in the super-Fricke dosimeter, we obtain GIµ[Fe(CN)63–]=(3.47 ± 0.06)× 10–5 m2 J–1 at 420 nm and GIµ(SCN)2˙–=(2.59 ± 0.05)× 10–4 m2 J–1 at 475 nm. These values remain unchanged when the solutions are saturated with air instead of O2 and are doubled in N2O-saturated solution.read more
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Book ChapterDOI
Aqueous Nitric Acid Radiation Effects on Solvent Extraction Process Chemistry
Stephen P. Mezyk,Stephen P. Mezyk,Thomas D. Cullen,Thomas D. Cullen,Gracy Elias,Gracy Elias,Bruce J. Mincher,Bruce J. Mincher +7 more
Journal ArticleDOI
The radiation chemistry of iodophenolsThe research described herein was supported in part by the Office of Basic Energy Sciences of the Department of Energy. This is contribution No. NDRL 4019 from the Notre Dame Radiation Laboratory.
TL;DR: The technique of pulsed electron radiolysis has been used to determine absolute rate constants for the reaction of the hydrated electron, hydroxyl radical and hydrogen atom with ortho-, meta-and para-iodophenol in aqueous solution as mentioned in this paper.
Journal ArticleDOI
Properties of the OH Adducts of Hydroxy-, Methyl-, Methoxy-, and Amino-Substituted Pyrimidines: Their Dehydration Reactions and End-Product Analysis
T. L. Luke,T. A. Jacob,H. Mohan,Hugo Destaillats,V. M. Manoj,P. Manoj,Jai P. Mittal,Michael R. Hoffmann,Charuvila T. Aravindakumar +8 more
TL;DR: In this article, the second-order rate constants of the reaction of hydroxyl radicals (•OH) with 2-amino-4-methyl pyrimidine (AMP), ADMP, DMHP, DMU, and 5,6-dimethyl uracil (DMU) were studied by pulse radiolysis and steady-state radiolyisation techniques at different pH values.
Journal ArticleDOI
Assessing the contribution of hydroxylation species in the photochemical transformation of primidone (pharmaceutical).
TL;DR: It is demonstrated that primidone can not only react with free HO but also react with lower-energy hydroxylation agents (HO-like) and that dissolved oxygen can affect the degradation rate of PMD by promoting HO formation.
Journal ArticleDOI
Carbonate radical anion-induced electron transfer in bovine serum albumin
Ravi Joshi,Tulsi Mukherjee +1 more
TL;DR: In this paper, the reaction of bovine serum albumin (BSA) with carbonate radical anion (CO 3 − ) has been studied using pulse radiolysis technique.
References
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Journal ArticleDOI
Critical Review of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radicals (⋅OH/⋅O− in Aqueous Solution
TL;DR: In this article, the rate constants for over 3500 reaction are tabulated, including reaction with molecules, ions and other radicals derived from inorganic and organic solutes, and the corresponding radical anions, ⋅O− and eaq−, have been critically pulse radiolysis, flash photolysis and other methods.
Journal Article
Critical review of rate condtants for reaction of hydrated electrons, hydrogen atoms and hydroxyl radicals in aqueous solution
Journal ArticleDOI
Yield for the scavenging of hydroxyl radicals in the radiolysis of nitrous oxide-saturated aqueous solutions
TL;DR: In this article, the thiocyanate dosimeter was calibrated against the Fricke system to obtain a value of 46,400 +-600 (molecules/100 eV) for the product of yield and extinction coefficient of (SCN)/sub 2/O-saturated solutions.
Journal ArticleDOI
Track effects in radiation chemistry. Concentration dependence for the scavenging of hydroxyl by ferrocyanide in nitrous oxide-saturated aqueous solutions
TL;DR: In this paper, the radiation chemical yield for oxidation of ferrocyanide by OH produced in the fast electron radiolysis of N/sub 2/O-saturated aqueous solutions was found to increase from a low concentration limiting yield of 5.2 to values in excess of 6.7.