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
Citations
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Treatment of statin compounds by advanced oxidation processes: Kinetic considerations and destruction mechanisms
TL;DR: In this article, the authors examined the use of advanced oxidation/reduction processes (AO/RPs) for the destruction of cholesterol lowering statin pharmaceuticals, which utilize the oxidizing hydroxyl radical (OH) and reducing aqueous electron (e − aq ), to degrade chemical contaminants.
Journal ArticleDOI
Dose rate effect on micronuclei induction in human blood lymphocytes exposed to single pulse and multiple pulses of electrons
TL;DR: The decrease in the yield at high dose rates per pulse suggests possible radical recombination, which leads to decreased biological damage, and Cellular response to the presence of very large numbers of chromosomal breaks may also alter the damage.
Journal ArticleDOI
Pulse radiolysis study on free radical scavenger edaravone (3-methyl-1-phenyl-2-pyrazolin-5-one).
TL;DR: Different from the previous reports, the main transient species by the reaction of edaravone with (*)OH radical in the absence of O(2) is attributed to OH-adducts.
Journal ArticleDOI
Free radical reactions with the extract of brassica family.
TL;DR: Kinetic studies indicated that extracts may act as free radical scavengers for O2(-), OH radicals and as an antioxidant to repair free-radical damage to biologically important guanosine radical.
Journal ArticleDOI
Comprehensive Assessment Of Antioxidant Activities of Apigenin Isomers: Vitexin and Isovitexin
Swati Khole,Niranjan A. Panat,Priyanka Suryawanshi,Suchandra Chatterjee,Tpa Devasagaya,Saroj S. Ghaskadbi +5 more
TL;DR: In this paper, the authors evaluated the antioxidant ability of vitexin and isovitexins against various radicals using standard in vitro radical scavenging assays and pulse radiolysis.
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.
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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.